Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,121 questions
8,121 questions with Exchange | Exchange Server | Management tags
2 answers
ECP breakage
I just finished applying the February 2026 Security Update (KB5074992) to our remaining Exchange 2016 CU23 nodes, we are still on the ESU program until the April cutoff but now OWA and ECP are throwing 500 errors. It seems like the update failed to…
Exchange | Exchange Server | Management
asked 2026-03-13T00:49:14.89+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(0, 77%, 10%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMJ%3C/text%3E%3C/svg%3E)
Mote Jeffery
60
Reputation points
answered 2026-03-13T01:47:58.71+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(32, 54%, 13%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESN%3C/text%3E%3C/svg%3E)
Steven-N
21,805
Reputation points Microsoft External Staff
Moderator
3 answers
One of the answers was accepted by the question author.
What is the proper way to rename a Microsoft Team and its related resources?
I have not been able to find a good resource online as to the proper way to rename a Microsoft Team and its related resources. Since there is no way for a Team Owner to do this today, it's up to admins to utilize PowerShell to try to tackle this issue. …
Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,121 questions
Microsoft 365 and Office | SharePoint | For business | Windows
Microsoft 365 and Office | SharePoint | For business | Windows
A group of Microsoft Products and technologies used for sharing and managing content, knowledge, and applications.
29,755 questions
Microsoft Teams | Microsoft Teams for business | Other
Microsoft Teams | Microsoft Teams for business | Other
Additional features, settings, or issues not covered by specific Microsoft Teams categories
20,917 questions
asked 2021-04-21T13:37:59.82+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(28.799999999999997, 71%, 12%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJ%3C/text%3E%3C/svg%3E)
jason4tl
41
Reputation points
commented 2026-03-12T21:27:40.8766667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(67.2, 45%, 16%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EHN%3C/text%3E%3C/svg%3E)
Haynie, Nicole
0
Reputation points
6 answers
Exchange 2019 onprem: rights problems with Get-ExchangeDiagnosticInfo
According to MS we need to use Get-ExchangeDiagnosticInfo to check Back Pressure. I want to automate that with a script running in task scheduler. Understanding back pressure | Microsoft Learn The user must have one of these roles: Get-ManagementRole…
Exchange | Exchange Server | Other
Exchange | Exchange Server | Other
A robust email, calendaring, and collaboration platform developed by Microsoft, designed for enterprise-level communication and data management.Miscellaneous topics that do not fit into specific categories.
1,603 questions
Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,121 questions
asked 2023-06-02T09:07:55.2966667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(83.2, 5%, 18%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ETS%3C/text%3E%3C/svg%3E)
TRÖSTER Joachim
6
Reputation points
answered 2026-03-12T10:29:45.7933333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(44.800000000000004, 14.000000000000002%, 14%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EA%3C/text%3E%3C/svg%3E)
Андрей Будников
0
Reputation points
2 answers
One of the answers was accepted by the question author.
401 Unauthorized errors after enabling Certificate-Based Auth
Since upgrading our on-premises farm to Exchange Server SE and enabling Hybrid Modern Authentication (HMA), we’ve hit a wall with mobile users. While Outlook on the web and Desktop clients authenticate fine using Entra ID, mobile devices using…
Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,121 questions
asked 2026-03-10T08:15:20.62+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(144, 96%, 23%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EBS%3C/text%3E%3C/svg%3E)
Burgos Shirnava
80
Reputation points
edited an answer 2026-03-11T08:56:40+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(150.4, 1%, 24%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EDT%3C/text%3E%3C/svg%3E)
Dora-T
11,125
Reputation points Microsoft External Staff
Moderator
1 answer
Exchange 2016 when starting exchange administrative service i get an server error in '/owa' application Assert: JMACProvider.getCertificates:protectionCertificates.length<1
Server Error in '/owa' Application. ASSERT: HMACProvider.GetCertificates:protectionCertificates.Length<1 Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information…
Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,121 questions
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(243.2, 57.99999999999999%, 33%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMP%3C/text%3E%3C/svg%3E)
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(297.6, 3%, 38%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EVV%3C/text%3E%3C/svg%3E)
2 answers
Emails disappeared from in box.
All emails disappeared from in box in Microsoft Exchange. Can not locate them in any other folder and when I try to restore from deleted folder, they are not there either. Please help.
Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,121 questions
asked 2026-03-09T19:04:07.94+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(172.8, 59%, 26%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EDF%3C/text%3E%3C/svg%3E)
Donna Fruge
0
Reputation points
edited an answer 2026-03-10T02:16:18.8833333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(195.2, 61%, 28%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ETT%3C/text%3E%3C/svg%3E)
TiNo-T
11,770
Reputation points Microsoft External Staff
Moderator
2 answers
Email Exchange 2019 not working
After restore backup from VEEAM application. Exchange server 2019 is up but it is not working properly
Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,121 questions
asked 2026-03-07T10:40:43.59+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(217.60000000000002, 9%, 31%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESI%3C/text%3E%3C/svg%3E)
Sachin Ingale
0
Reputation points
commented 2026-03-09T12:40:37.2233333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(80, 18%, 17%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAH%3C/text%3E%3C/svg%3E)
Austin-H
8,330
Reputation points Microsoft External Staff
Moderator
2 answers
One of the answers was accepted by the question author.
is it safe to remove Exchange Trusted Subsystem group from Administrators group?
Hi all, We have Exchange server 2019 and we found it is member of AD built in Administrators group. Is it safe to remove Exchange Trusted Subsystem group from AD Administrators group? Best regards, Abdu;-Malik
Exchange | Exchange Server | Other
Exchange | Exchange Server | Other
A robust email, calendaring, and collaboration platform developed by Microsoft, designed for enterprise-level communication and data management.Miscellaneous topics that do not fit into specific categories.
1,603 questions
Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,121 questions
Exchange | Other
Exchange | Other
A powerful email and collaboration platform developed by Microsoft, designed to support enterprise-level communication and productivity. Miscellaneous topics that do not fit into specific categories.
897 questions
asked 2023-02-05T20:59:47.3466667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(25.6, 51%, 12%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAM%3C/text%3E%3C/svg%3E)
Abdul-Malik
20
Reputation points
answered 2026-03-05T14:09:19.1533333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(313.6, 15%, 40%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMM%3C/text%3E%3C/svg%3E)
Me&Me
0
Reputation points
2 answers
Certificate renewal
I am using Exchange Server SE (Subscription Edition). The Microsoft Exchange Server Auth Certificate on my server is expiring. Below is the current certificate information: (Get-AuthConfig).CurrentCertificateThumbprint | Get-ExchangeCertificate |…
Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,121 questions
asked 2026-03-03T18:58:51.4866667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(179.20000000000002, 7.000000000000001%, 27%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EGM%3C/text%3E%3C/svg%3E)
Glenn Maxwell
13,346
Reputation points
commented 2026-03-05T03:35:22.4466667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(246.4, 68%, 33%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJT%3C/text%3E%3C/svg%3E)
Jade-T
10,785
Reputation points Microsoft External Staff
Moderator
2 answers
Iphone Native Calender App Stop syncing the Calender Events
The native Calendar app on iPhone is not displaying events from my company/exchange calendar. Outlook app is working correctly. 🔹 Details: Device: iPhone (iOS version: ___) Account Type: Exchange / Microsoft 365 / Company Account Issue Observed: …
Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,121 questions
asked 2026-03-03T23:05:53.6533333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(3.2, 35%, 10%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EDV%3C/text%3E%3C/svg%3E)
Dobbugottu, Venkata Rajendra Prasad (BIC USA)
0
Reputation points
commented 2026-03-05T01:23:20.6433333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(102.4, 11%, 19%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ETD%3C/text%3E%3C/svg%3E)
Teddie-D
12,925
Reputation points Microsoft External Staff
Moderator
3 answers
Retrieving Email Data from Mailbox for the Past 6 Years
Is it possible to retrieve all emails sent from a mailbox over the past 6 years in CSV or Excel format from the admin center? Are there any PowerShell commands available to check and extract this data?
Exchange Online
Exchange Online
A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.
7,013 questions
Outlook | Windows | Classic Outlook for Windows | For business
28,887 questions
Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,121 questions
Exchange | Other
Exchange | Other
A powerful email and collaboration platform developed by Microsoft, designed to support enterprise-level communication and productivity. Miscellaneous topics that do not fit into specific categories.
897 questions
asked 2025-01-19T06:19:26.46+00:00
Mohana Reddy
185
Reputation points
answered 2026-03-05T01:05:28.4533333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(54.400000000000006, 44%, 15%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ELH%3C/text%3E%3C/svg%3E)
Lishi He
0
Reputation points
2 answers
One of the answers was accepted by the question author.
Delegation Certificate renewal
Hi All, I am running a hybrid environment with Microsoft Exchange Server Subscription Edition All user mailboxes are created on-premises and then migrated to Exchange Online. I have replaced my actual domain name with contoso.com in the examples below.…
Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,121 questions
asked 2026-03-03T11:41:04.2366667+00:00
Glenn Maxwell
13,346
Reputation points
accepted 2026-03-04T19:52:40.61+00:00
Glenn Maxwell
13,346
Reputation points
2 answers
One of the answers was accepted by the question author.
Problem with FMS service in Exchange 2019
Hi everyone! There is a problem with the Microsoft Filtering Management Service, which is responsible for managing filters in Exchange. At some point, the service stopped working, that is, if you look at the logs, the following events are observed: The…
Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,121 questions
asked 2026-03-03T11:53:48.55+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(96, 44%, 19%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAA%3C/text%3E%3C/svg%3E)
Aleksandr Aleksandr
20
Reputation points
edited an answer 2026-03-03T14:34:16.5433333+00:00
Steven-N
21,805
Reputation points Microsoft External Staff
Moderator
2 answers
como puedo certificar que no se recibio un email
UnifiedAuditLogIngestionEnabled : False Después de ingresar a la consola del servidor Exchage del servicio de correo de la empresa para hacer un auditoria de una de las cuentas encuentro que los logs (UnifiedAuditLogIngestionEnabled : False) de auditoria…
Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,121 questions
asked 2026-02-11T22:13:18.84+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(150.4, 88%, 24%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EST%3C/text%3E%3C/svg%3E)
SOPORTE TI
0
Reputation points
commented 2026-02-28T01:01:06.82+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(172.8, 2%, 26%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ES6%3C/text%3E%3C/svg%3E)
SoulFly-6524
0
Reputation points
2 answers
Hotmail/Live email bouncebacks causing errors and failures on LISTSERV
Hello, We have been using LISTSERV for many years to send out notifications for scheduled permitting inspections. This has worked flawlessly for many years with no management. User signs up for notifications, receives notifications, muy bien. Lately, for…
Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,121 questions
asked 2026-02-27T13:19:34.52+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(236.8, 78%, 32%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJP%3C/text%3E%3C/svg%3E)
Jacob Pelley
0
Reputation points
edited an answer 2026-02-27T14:49:28.29+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(105.60000000000001, 69%, 20%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EHV%3C/text%3E%3C/svg%3E)
Hin-V
13,070
Reputation points Microsoft External Staff
Moderator
2 answers
Exchange server 2010 on server 2012
When emails are trying to send to private companies it does not send with a return email: Generating server: ####### [Moderator note: personal info removed].mail.protection.outlook.com #550 5.7.1 Service unavailable, client host [#####] blocked using…
Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,121 questions
asked 2026-02-26T14:12:50.7233333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(166.4, 71%, 26%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAY%3C/text%3E%3C/svg%3E)
Antonio Young
0
Reputation points
commented 2026-02-27T13:54:21.36+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(144, 15%, 23%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJB%3C/text%3E%3C/svg%3E)
Jack-Bu
6,675
Reputation points Microsoft External Staff
Moderator
1 answer
Outlook 2021 LTSC on Windows 11 – Emails delayed ~30 minutes, OWA instant, Windows 10 unaffected (Exchange 2016)
Body Hello, We are experiencing a client-side mail delivery delay issue affecting Outlook 2021 LTSC on Windows 11 in an on-premises Exchange Server 2016 environment. Environment Exchange Server 2016 (on-premises) Outlook 2021 LTSC Windows 11…
Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,121 questions
asked 2026-02-08T11:02:06.8033333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(0, 11%, 10%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EHH%3C/text%3E%3C/svg%3E)
Hu Haowen
0
Reputation points
answered 2026-02-25T23:05:50.89+00:00
FIRAT BOYAN
380
Reputation points Microsoft External Staff
3 answers
Exchange Server Cluster not connecting in Outlook
Exchange Server Cluster not connecting in Outlook. OWA is down. Preparing for ES upgrade. Certificate expired but has been renewed and appears to be working properly. Receiving MX19-1 server appears ok, MX19-2 giving error on Exchange Manangement…
Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,121 questions
asked 2026-02-24T02:14:25.76+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(179.20000000000002, 43%, 27%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ERA%3C/text%3E%3C/svg%3E)
Rick Agnew
0
Reputation points
commented 2026-02-25T04:50:23.9133333+00:00
Steven-N
21,805
Reputation points Microsoft External Staff
Moderator
1 answer
How can we verify that the certificate is properly assigned to SMTP
After renewing our SSL certificate on Exchange Server (on-prem), external mail flow stopped while internal mail still works. Messages are stuck in the queue with TLS errors. How can we verify that the certificate is properly assigned to SMTP and that…
Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,121 questions
asked 2026-02-25T04:08:05.6766667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(76.8, 84%, 17%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EC%3C/text%3E%3C/svg%3E)
Charles
140
Reputation points
answered 2026-02-25T04:20:28.6566667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(291.2, 38%, 38%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMP%3C/text%3E%3C/svg%3E)
Marcin Policht
82,360
Reputation points MVP
Volunteer Moderator
4 answers
Installed new Certificate but SMTP uses the old one.
All, I have installed a new certificate, IIS uses the right one and in Exchange also assign the IMAP,POP and SMTP to the new certificate. The creation of the DANE TLSA record went wrong due to the fact that the old certificate is used because it is…
Exchange | Exchange Server | Management
Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
8,121 questions
asked 2026-02-24T12:12:04.8533333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(259.20000000000005, 25%, 35%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJV%3C/text%3E%3C/svg%3E)
Johan Valstar
11
Reputation points
answered 2026-02-24T22:23:23.4733333+00:00
Johan Valstar
11
Reputation points