Hi @AFIRD Admin
Thanks for visiting our forum. Microsoft Teams tag is mainly focused on the general issue of Microsoft Teams application troubleshooting. Is there any error message for the Teams account?
Based on your description, this error message may occur when your subscription is no longer active or has been blocked by the admin. I suggest you may firstly refer to following information to narrow down:
- Login Office 365 admin center->Billing->Your products, make sure the license is still in active:
- Try to re-assign the license, wait for a while to let changes take effect.
- Use browser in Private mode (to avoid caches) and confirm if user can access Outlook Web App and Teams web client.
Hope this helps! Moreover, if the above is not your scenario or I have misunderstood anything, please correct me and provide us with detailed information about the issue including the screenshot so that we can better understand to further assist you.
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