Calendar does not work

Question

Calendar does not work

John Manitara 0

Hi there. My calendar does not work and I cannot set up a meetings. Please advise.

Error Code = Unknown

Error Message = Unknown

Troubleshooting link = https://learn.microsoft.com/en-us/microsoftteams/troubleshoot/exchange-integration/teams-exchange-interaction-issue

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Answer 1

Hello @John Manitara

Welcome to Q&A forum!

Firstly, to ensure we're aligned on this issue and avoid any misunderstanding, I’d like to clarify a few points:

1. Are you using personal (hotmail.com, outlook.com) or educational (@edu_) or business account (@domain.com)?

2. May I confirm whether you're currently unable to create a new event in your Microsoft Teams calendar?

User's image

3. Regarding the troubleshooting link, could you please confirm whether the issue you're experiencing is mentioned in the article?

(*It would be very helpful if you could send me a screenshot of the issue. That way, I can better understand the problem and address it more accurately.)

4. Have you tried to create a meeting from the calendar in your Outlook (Web & App)?

5. Have you checked if your mailbox is hosted on Exchange Online?

Determine the version of Microsoft Exchange Server my account connects to - Microsoft Support

Besides, during waiting for your confirmation, you can also try some troubleshooting steps to see if it helps your situation:

Sign out and sign back into Teams

Click your profile picture in Teams -> Sign out -> Close Teams completely -> Reopen and sign in.

Clear Teams cache

Clear the Teams client cache - Microsoft Teams | Microsoft Learn

Check Teams Web App
- Go to https://teams.microsoft.com and try accessing your calendar there.

Looking forward to hearing from you for further assistance!

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Alina-Le 4,600 Reputation points Microsoft External Staff Moderator

2025-09-21T14:55:14.6066667+00:00

Hello @John Manitara

Just checking in to see how things are going with this issue. Have you had a chance to check my latest response?

If anything’s unclear or if there’s anything more I can do to help, feel free to drop a few details or even send a screenshot. I’ll be happy to look into it and support you however I can.

Wishing you all the best!
Alina-Le 4,600 Reputation points Microsoft External Staff Moderator

2025-09-22T09:26:41.1833333+00:00

Good day @John Manitara

I hope you're doing well and that this message reaches you at a good time.

I'm following up to check on the progress regarding your issue. I've previously shared a few questions to help narrow things down so I can better understand the situation and provide you with appropriate solutions.

Addtionally, might I confirm if you are a delegate to manage other Microsoft Outlook calendar as mentioned in this article? Resolve interaction issues between Teams and Exchange Server - Microsoft Teams | Microsoft Learn

Please take your time to respond, and I'm here to work through this with you. We will try to figure it out together.

In the meantime, I’ll be assisting others on the forum, but if you need a quicker response, just tag me in your message and I’ll jump in right away.

Stay safe & happy!

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Calendar does not work

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