Outlook calendar not working

Hi @Isabella Fernandez,

Thank you for reaching out and for describing the behavior you’re seeing. Based on the thread’s tags, I understand that you’re encountering this issue while using classic Outlook for Windows.

To help me better understand the situation, could you please confirm the following details:

• Does the calendar display correctly in Outlook on the web when you sign in to the same account?
• Are you using classic Outlook for Windows only, or does the issue also occur in the new Outlook?
• Does the issue affect only your primary calendar, or any additional/shared calendars as well?

In the meantime, you may consider trying the steps below to help with this type of behavior in classic Outlook:

1/ Test in Outlook on the web

If the calendar loads normally in Outlook on the web, this would suggest the mailbox data itself is intact, and the issue may be isolated to the desktop client.

2/ Clear the Outlook cache

• Close the Outlook app.
• Press the Windows + R keys simultaneously to open the Run dialog box.
• Type the following path into the Run box and press Enter: %localappdata%\Microsoft\Outlook\RoamCache

• This will open the RoamCache folder containing the cache files associated with your Outlook profile. Usually, it's located at: C:\Users{User name}\AppData\Local\Microsoft\Outlook\RoamCache
• Click anywhere within the folder, press Ctrl + A to select all files, and then press the Delete key to remove them. Alternatively, you can right-click the selection and choose the Delete option from the context menu.

After clearing the cache, restart Outlook again. It will rebuild the necessary cache files from scratch.

3/ Repair Outlook

• Close Outlook completely.
• Select Start, type Control Panel, and open it.
• Select Programs > Programs and Features.
• Locate Microsoft 365 Apps or Microsoft Office in the list.
• Right‑click it and select Change (or Modify).
• Choose Quick Repair > Repair (then, if needed, Online Repair) and follow the on‑screen instructions.

After the repair finishes, restart the computer and open Outlook again to see whether the calendar loads correctly.

4/ Create a new Outlook profile

Testing with a new Outlook profile can help determine whether the existing profile is contributing to the issue.

• Right click the Windows Start button and select Run. In the Run dialog box, type: Outlook.exe /profiles and then press Enter.
• On the profile picker dialog box, select Options

Note: Before selecting New, consider selecting the check box for "Prompt a profile to be used." If this is enabled, you will get a prompt every time you start Outlook to pick which profile you want to open. This is helpful when you have multiple profiles and need to switch between them.

• Select New.

• Type a name for the new Outlook Profile and select OK.

Once the new profile is created, you will need to add your email account to the profile.

5/ Contact Microsoft Support

If the issue persists after trying these steps, the best next step is to reach out to your IT administrator to submit a support request to Microsoft for deeper backend review. A technical support engineer can then initiate a remote session to examine the situation, validate backend settings, and run any necessary synchronization tools to resolve the issue. If further analysis is needed, they can escalate the case to a specialized team for deeper investigation.

For detailed instructions on how to get support, please share this link to your IT admin: Get support - Microsoft 365 admin.   

Please note that forum moderators do not have access to user account settings and cannot assist with logging in, resetting passwords, or changing access rights. While we do not have access to internal systems or administrative tools required to resolve account-specific or backend-related issues, we’ll continue doing our best to support you within the scope of our responsibilities.

I hope this information is helpful. Please follow these steps and let me know if it works for you. If not, we can work together to resolve this.

Thank you for your patience and your understanding. If you have any questions or need further assistance, please feel free to share them in the comments on this post so I can continue to support you.

I look forward to continuing the conversation.

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