Teams default log in details

[stewietm]

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

We have a company domain - internal.companyA.co.uk but use a completely different suffix companyB.com for email via 365.

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

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

[#2 · Accepted solution]

@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.

Computer\HKEY_CURRENT_USER\Software\Microsoft\Office\Teams
SkipUpnPrefill (REG_DWORD) 0x00000001 (1)

For reference and guidance.

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

https://docs.microsoft.com/en-us/microsoftteams/troubleshoot/known-issues/teams-defaults-to-domain-j...

'Sign in to Microsoft Teams using modern authentication'

https://docs.microsoft.com/en-us/microsoftteams/sign-in-teams