Joining a meeting on Microsoft Teams is very simple.

All you should probably do is choose the Join Microsoft Teams Meeting link you received in the invitation email.

But sometimes, Microsoft Teams wont let you join the meeting.

MS Teams Header

Teams may remain stuck on the Connecting screen.

Or you may get all sorts of errors.

Close Teams and follow the steps below.

microsoft teams cache folder

venture to access Teams in private or incognito mode.

Use the Teams mobile app if you already installed it on your phone.

looks like Outlook and Teams sometimes fail to sync all the information from the user profile.

microsoft-teams-check-for-updates

It seems that users who booked the meeting in Outlook experienced meeting connection problems more frequently.

Certain features may not work properly on outdated Teams versions.

Whitelist teams.microsoft.com

If youre using Mimecast URL Threat Protection, add teams.microsoft.com as an exception.

uninstall microsoft teams

This will whitelist Teams.

Mimecast URL Threat Protection and other similar tools re-write the Teams URL.

Thats why you cant join the meeting.

Whitelisting Teams should get the job done.

Furthermore, if youre using an email security gateway, you may experience the same issue.

This is because the tool rewrites the Teams Meeting invitation URLs for external meetings.

Thats why theJoinbutton does not work for external attendees.

Or you often experience this problem with meetings organized by external parties.

To solve this issue, simply add an exception for https://teams.microsoft.com/.

In this manner, the gateway wont change the URL.

Reinstall the Teams App

If nothing worked, uninstall Teams.

Let us know which method worked for you.