Microsoft Teams integration throwing error after working fine before

[ManuelZ]

I am working on a ServiceNow and Microsoft Teams integration PoC and at first, everything worked fine. At some point I could not start a teams chat from the incident form in ServiceNow anymore and I get an error message saying "You do not have a valid email to start Microsoft Teams Chat". I checked the tenant, the email adress of my user, tried impersonating a different user and tried creating a new user. Even logging out of ServiceNow using virutal agent in Teams and logging back in (which worked perfectly fine) did not solve the issue. 

Did anyone face similar issues, or has an idea what else I can try to fix that issue?

Thanks

[Nick Papineau]

We were encountering this issue and after working with SN support reps we tracked it down to the Azure User Mappings not being imported correctly because of a subflow not running. They republished the subflow that handles the import and then the Teams integration started working correctly.