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Fix Microsoft Teams Regional Settings Changed After Domain Verification
Question details
The user's Microsoft Teams calling formats and regional settings unexpectedly changed to the United States after completing a domain verification, causing external calls to use the US dialing format instead of the United Kingdom format.
- Product
- Microsoft Teams
- Device & OS
- not provided
- Scenario
- Managing Microsoft 365 domain settings and observing incorrect location behaviors in Teams.
- Observed behavior
- Teams calls appear to originate from the US, and external calls use the US dialing format instead of the expected UK settings.
Ensure you have Microsoft 365 Global Administrator or Teams Administrator permissions before attempting to modify user locations and voice routing configurations.
Update User Country/Region in Microsoft 365 Admin Center
Domain verification does not natively alter regional settings. The most direct fix is to manually verify and correct the region assignment for affected users.
Regional formats affect how numbers and dates display across Microsoft 365 services. If a provisioning glitch during domain verification reset these properties, you will need to reassign the correct usage location for your users.
Log in to the Microsoft 365 admin center and navigate to Users > Active users.
Click on the name of a user whose Teams dialing format has changed to open their account properties pane.
Go to the Account tab and select 'Manage contact information'. Check the Country or region field.
If the location is set to the United States, change it back to the United Kingdom (or your correct region) and click 'Save changes'.
Verify Teams Dial Plans and Voice Configurations
If the user region is correct but the calling format remains incorrect, you must check the specific Teams voice and dial plan configurations.
Contact Microsoft 365 Support for Log Investigation
If manual adjustments do not resolve the dialing format issue, support intervention is required to investigate tenant backend logs.
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Frequently Asked Questions
Why did domain verification change my Teams dialing format?
Domain verification does not natively alter Teams regional or calling settings by design. If this occurs, it is typically due to a provisioning anomaly or a backend glitch in Microsoft 365 synchronizing default tenant locations to user accounts.
Can I use an API or PowerShell to change multiple users' regional settings back to the UK?
Yes. Microsoft 365 administrators can use Microsoft Graph API or PowerShell cmdlets (such as Set-MsolUser or Set-AzureADUser) to bulk update the 'UsageLocation' property for all affected users efficiently.
Are Teams calling settings separate from the Microsoft 365 display language?
Yes, they are configured independently. While Microsoft 365 regional formats affect the display of dates and numbers across apps, Teams location, dial plans, and voice routing are managed explicitly within the Microsoft Teams Admin Center under the Voice settings.
