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Failure to login into Teams on mobile after a tenant to tenant migration

<span id="hs_cos_wrapper_name" class="hs_cos_wrapper hs_cos_wrapper_meta_field hs_cos_wrapper_type_text" style="" data-hs-cos-general-type="meta_field" data-hs-cos-type="text" >Failure to login into Teams on mobile after a tenant to tenant migration</span>

Conrad Murray
03 July, 2025

Recently we have seen some end users that have not been able to log back in to Microsoft Teams on their mobile devices after a tenant to tenant migration. No matter what they try, they are always forced to connect back to the source tenant. Outlook was connecting fine.

End users had tried deleting all their Microsoft apps, including MS Authenticator and already unenrolled the device from the source and enrolled to the target. But not always.

The answer in this particular case was to clear the Mobile Edge Browser User Account Cache.

On the device open Edge Browser, and type this at the address bar: edge://signin-internals

edge://signin-internals

Find: Remove all accounts and click it.

Conrad Murray

Conrad Murray

Conrad Murray is a Microsoft Certified IT consultant working in IT for over 20 years specialising in the Messaging arena and in particular Office 365 and previously Microsoft Exchange On-Premises and IBM Domino. Working with like minded colleagues now delivering very large scale complex migrations from Office 365 to Office 365 (tenant to tenant), Lotus Notes and On-Premises Microsoft Exchange to Office 365.

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