302 questions with Outlook | Web | Outlook on the web for business | Sign in tags

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2 answers

Outlook Login Error

Can no longer access Outlook. When trying to access Outlook via app, receive the following error: We couldn't reach the email server. Please try again. Can log in to Microsoft account on a browser, but receive the following error when trying to access…

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asked 2026-03-11T21:03:17.1666667+00:00
Rachel 0 Reputation points
edited the question 2026-03-11T22:33:46.13+00:00
Kristen-L 10,815 Reputation points Microsoft External Staff Moderator
2 answers

Unable to sign in

UTC Date: 2026-03-09T22:46:33.126Z Client Id: Session Id: Client Version: 20260227002.16 BootResult: configuration Back Filled Errors: Unhandled Rejection: Error: 500:undefined|undefined:undefined err:…

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asked 2026-03-09T22:49:44.5733333+00:00
Christopher Griffith 0 Reputation points
commented 2026-03-11T04:40:34.54+00:00
Darren-Ng 8,425 Reputation points Microsoft External Staff Moderator
2 answers

Unable to Login to Email Account - Error 500

Unable to login to email account for longer than 24 hours. Shows error message 500. Tried using Incognito window and cleared cache, still unable to login.

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asked 2026-03-05T04:13:22.9133333+00:00
Braces & Implant 0 Reputation points
commented 2026-03-11T04:00:13.5133333+00:00
Jade Ng 9,370 Reputation points Microsoft External Staff Moderator
1 answer One of the answers was accepted by the question author.

Probleme mit dem Outlook Business Konto von Microsoft 365

Sehr geehrte Damen und Herren, Ich habe das Problem, dass ich mich bei meinem Outlook Konto (Business) nicht mehr anmelden kann, obwohl ich vermute das ich dass richtige Passwort habe. Zudem habe ich leider keinen Admin regristriert, weshalb ich…

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asked 2026-03-10T16:25:13.85+00:00
Marcel Wittmann 20 Reputation points
commented 2026-03-10T19:41:07.28+00:00
Kristen-L 10,815 Reputation points Microsoft External Staff Moderator
1 answer

Lost access to the Authenticator app

Ive lost access to the authenticator app and can no longer access the accounts that used it how do I regain access?

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asked 2026-03-04T08:50:00.8466667+00:00
aqdas mahmud 0 Reputation points
edited an answer 2026-03-04T09:21:02.92+00:00
Rin-L 15,665 Reputation points Microsoft External Staff Moderator
1 answer One of the answers was accepted by the question author.

Microsoft OutLook, accessing my Business Email : [Moderator note: personal info removed]

I have had issues with loading New Outlook, now resolved. However, even though I put in the correct password I get and error message. Detailed below Session Id: [Moderator note: personal info removed] Timestamp: 1770951530719 Mb : <mod: PII…

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asked 2026-02-16T22:30:19.2566667+00:00
Robert Gibson 20 Reputation points
edited a comment 2026-03-02T04:52:33.6533333+00:00
Jade Ng 9,370 Reputation points Microsoft External Staff Moderator
3 answers

Internal server error- how do I resolve so I can send/receive email?

An internal server error occurred. The operation failed., Organization 'SIMPKO.onmicrosoft.com' is marked for removal. If this state is unexpected then please contact Office 365 Support. This is the message that keeps popping up.

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asked 2026-02-25T15:34:41.1833333+00:00
Willie Simpkins 0 Reputation points
answered 2026-02-25T22:49:28.69+00:00
Gérard Oomens 119.8K Reputation points Volunteer Moderator
3 answers

Unable to sign into Microsoft Outlook

I keep getting the error AADSTS5000611: Symmetric Key Derivation Function version 'KDFV1' is invalid. but I have updated my windows to 22h2 already

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asked 2026-02-24T16:14:23.8766667+00:00
Beron, Jeff 0 Reputation points
commented 2026-02-25T19:18:41.01+00:00
Vy Nguyen 9,470 Reputation points Microsoft External Staff Moderator
1 answer

Login not possible

Since the beginning of the year, I have had the problem that I cannot log into my email account via Outlook. I have contacted Microsoft support several times, and they have repeatedly told me to contact Outlook support directly, but I am unable to do…

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asked 2026-02-23T03:59:08.95+00:00
Alexander Becker 0 Reputation points
edited the question 2026-02-23T12:50:42.2766667+00:00
Gérard Oomens 119.8K Reputation points Volunteer Moderator
2 answers

I can't log in

Hello, for some reason, I can’t log in to my work account. It keeps saying that the password is wrong, even though it’s the same one I’ve been using for the past year. When I try to recover the account, it tells me that the email doesn’t exist. The…

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asked 2026-02-23T10:04:52.79+00:00
Ca 0 Reputation points
edited the question 2026-02-23T12:08:46.4133333+00:00
Gérard Oomens 119.8K Reputation points Volunteer Moderator
1 answer

Outlook Web App repeatedly logs out instead of in on Firefox

My question is essentially the same as that at https://learn.microsoft.com/en-us/answers/questions/4755464/ . After the first login to outlook.office.com/mail (or similar, like the calendar), the next time I open Firefox (or a fork thereof), trying to…

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asked 2026-02-11T15:08:47.88+00:00
Mark Spindler 0 Reputation points
edited an answer 2026-02-11T22:40:23.06+00:00
Chris Duong 7,505 Reputation points Microsoft External Staff Moderator
1 answer One of the answers was accepted by the question author.

Error message meaning I simply cannot open outlook mail

WHat does this mean? UTC Date: 2026-02-04T10:19:45.100Z Client Id: [Moderator note: personal info removed] Session Id: [Moderator note: personal info removed] Client Version: 20260116004.06 BootResult: configuration Back Filled Errors: Unhandled…

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asked 2026-02-05T06:36:58.0966667+00:00
Tom Watson 20 Reputation points
commented 2026-02-09T07:52:42.1+00:00
Henry-N 10,540 Reputation points Microsoft External Staff Moderator
2 answers

How to resolve this error to access outlook on browser

For almost a week now, I've been unable to access Outlook on the web. I can still use the desktop app. I've tried different browsers, different servers, and it's still not working. Any insight is helpful. Thanks! UTC Date: 2026-02-04T23:41:21.722Z Client…

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asked 2026-02-04T23:43:43.1833333+00:00
Melissa-4413 0 Reputation points
answered 2026-02-05T02:36:45.69+00:00
Vivian-HT 13,695 Reputation points Microsoft External Staff Moderator
2 answers One of the answers was accepted by the question author.

Online account restoration

i lost my official email upon which my online user account was based on my pc. This was because of GoDaddy subscription problem. when the payment went through to GoDaddy and my email was restored. I couldn't login anymore except through alternative local…

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asked 2026-02-02T21:29:40.4933333+00:00
Chika Worka 20 Reputation points
answered 2026-02-03T00:47:16.0133333+00:00
Vivian-HT 13,695 Reputation points Microsoft External Staff Moderator
2 answers

Outlook Error 500

When I tried to log in to outlook.office.com, the message shows like the error had occurred while trying to sign in. The error which popup is 500. We are paying a Company for the license, and still we can't access any mails in Outlook.

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asked 2026-01-25T18:06:00.36+00:00
Loftbar Info 0 Reputation points
commented 2026-01-30T07:06:36.36+00:00
Jade Ng 9,370 Reputation points Microsoft External Staff Moderator
3 answers

My wife's email is locked out she has tried everything does anybody know how to contact IT at Microsoft.

My wife's email is locked out she has tried everything does anybody know how to contact IT at Microsoft. Please she needs her email need help.

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asked 2026-01-06T15:43:30.1033333+00:00
sam ashtareeh 20 Reputation points
edited a comment 2026-01-29T21:16:41.6966667+00:00
Ryan-N 10,885 Reputation points Microsoft External Staff Moderator
1 answer

Microsoft 365 Administration Access

I need some help to access my account for the Microsoft 365 administration center, because I have an overdue invoice and for whatever reason, I can't access my administration account with the same Outlook email that I use to log in. I need technical…

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asked 2026-01-26T18:12:02.1966667+00:00
Alexander Craig Summers 0 Reputation points
commented 2026-01-27T21:56:57.4433333+00:00
Kristen-L 10,815 Reputation points Microsoft External Staff Moderator
2 answers

How to Fix Error Code [Moderator's note: personal information removed]

Everytime I attempt to log in, I get the error code: [Moderator's note: personal information removed] BootResult: configuration Back Filled Errors: Unhandled Rejection: Error: 500:undefined|undefined:undefined err:…

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asked 2026-01-25T21:18:28.86+00:00
Joe 0 Reputation points
edited the question 2026-01-25T22:17:44.55+00:00
Hendrix-C 12,120 Reputation points Microsoft External Staff Moderator
2 answers

I have lost access to my admin account of microsoft 365 due to which i am not able to make any changes to my subscription plan

Lost access to our admin account as there is 2FA enabled. We are not able to access the account as 2FA is lost. How can i recover my account for the same,

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asked 2026-01-22T11:47:14.6566667+00:00
amit pal 0 Reputation points
edited an answer 2026-01-22T15:53:57.42+00:00
Henry-N 10,540 Reputation points Microsoft External Staff Moderator
1 answer

TooManyObjectsOpenedError Windows PC

Whenever I try to log in I keep getting the below error. I tried clearing my cache/cookies, updating my computer/browser, logging-in in a different browser (edge), restarting my computer, logging out of all Office/microsoft sessions and logging back in,…

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asked 2026-01-16T19:08:56.73+00:00
Scarlett Sahota 0 Reputation points
commented 2026-01-20T20:29:30.64+00:00
Kai-L 11,330 Reputation points Microsoft External Staff Moderator