Teams users are showing as external SfB clients to other external tenants

Super Contributor

Hello Teams Community,

 

Please i need your help on this.

 

We have 2 separate tenants on separate domains. Both tenants Teams have external access switched on. One tenant is in Island mode and the other is in Teams Only mode.

 

Before the weekend (26th March) Users from both tenants were messaging and calling the other tenant successfully with all features available; however, since the weekend, users on both sides are now showing as external Skype clients and can no longer continue using existing conversations and have lost features.

 

Nothing was changed or updated in either Teams Admin portals (e.g. policies, Teams settings, etc.).

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