Teams default log in details

Occasional Visitor

Is there a way to change how Teams pulls it's log in information?

We have a company domain - but use a completely different suffix for email via 365.

When Teams loads and attempts to sign in, it is trying to use the internal domain account - as default.

Is there a way to change this behaviour across all users so that Teams automatically pulls the new email address from Outlook?

1 Reply
Best Response confirmed by ThereseSolimeno (Microsoft)

@stewietm Hey, as far as I know Teams will always try and log into the domain-joined PC account. But you can use the following registry key to turn off pre-population of the UPN in the sign-in prompt.


SkipUpnPrefill (REG_DWORD) 0x00000001 (1)


For reference and guidance.


'Teams will always log into the domain-joined PC account'


'Sign in to Microsoft Teams using modern authentication'