Hey there @Alex33712 - great question! Firstly, check out our New User Guide - it’ll def prove helpful as you get used to the platform!

Here are some steps you can try: 

Disconnect and reconnect your Microsoft Teams integration — either from your Integrations page (if you connected the integration directly), or from your Calendar Connections page (if you connected the integration via your Office 365 calendar connection). Schedule a test event to see if the Microsoft Teams link is generated as expected.

If it is, you're good to go! If you need to regenerate the Microsoft Teams links for any meetings currently displaying "Action Required," you can "reschedule" those events for the same date/time they were originally scheduled.

If this does not resolve the issue, you will likely need more personalized troubleshooting support. In that case, please log into your Calendly account and click “help” to interact with our support team for further assistance! I hope this helps!

It’s a serious problem

Do you mind checking out the information I provided to the OP,  looking into it, then letting me know if it helps and/or what specific issue you are facing? Thanks!