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OldSkull
Copper Contributor
Apr 28, 2026
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How to explicitly state an external org is trusted

We have a B2B relationship with our parent company. They manage their own M365 we manage ours, but we added each others' domains as instructed in Cross-Tenant Access Settings and allowed access to each other's directory and calendar. However, on our Teams, their users pop up with a grey "external" badge stating "This person's org hasn't yet been added to your org's trusted list" even though Team's External Access Settings is set to Allow all External Domains, which means there is no trust list to begin with. Do the trusted domains have to be specified explicitly if so, is there a way to set this external domain as trusted without having to change "Allow all External domains" to "Allow only specific external domains"?

 

   

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