Teams B2B This person is from outside your organization - whitelist

Question

https://answers-afd.microsoft.com/static/images/image-not-found.jpgHello Folks,

my configuration:

I have two tenants - contoso.com and example.org.

I'm trying to configure that ******@contoso.com can message susan@example.org

I've successfully configured this with Entra B2B direct connect. Users can chat in teams, use scheduling assistance via Teams and Outlook. I'm usings Teams Online ver 2.

However, when ******@contoso.com tries to write 1:1 to Susan, on Susan's screen there is a warning Screenshot
(I could not upload image here, all emails, etc are not personal information, just placeholders such as example.org and contoso.com)) saying:

This person is from outside your organization. Messages from unknown or unexpected people could be spam or phishing attempts. Never share your account information or authorize sign-in requests over chat. To be safe, preview their messages.

I tried to look up Google, support groups, etc, teams documentation, and Powershell cmdlet and found nothing. 

I've read online to change teams to allow external access only for the specified domains, but I don't want this because then I would need to specify all external domains that access these two tenants.

I've also read somewhere in the documentation that these warnings are connected to exchange online, but i didn't try setup mentioned in this thread here: https://answers.microsoft.com/en-us/msoffice/forum/all/add-exception-for-the-following-recipient-is/6c78629e-7e9e-46f3-8740-b8348344b9bf

such as: 

New-RemoteDomain -DomainName *.contoso.com -Name Contoso

Set-RemoteDomain -Identity Contoso -IsInternal $true

Does anyone have an idea how to disable this? Or add to whitelist contoso.com so that for this org it's not showing? It's a really annoying warning.

Thanks :)

Answer 1

This default warning currently cannot be disabled for security reasons. Only option to hide it is to let user add this contact to their contact list. Also making Multi-Tenant organization makes this little bit easier because the GAL is integrated natively.

Answer 2

This default warning currently cannot be disabled for security reasons. Only option to hide it is to let user add this contact to their contact list. Also making Multi-Tenant organization makes this little bit easier because the GAL is integrated natively.

Hi Kazzan,

thanks for the response :) I was thinking about Multi-Tenant Organization but it is still in Preview mode, and not released as GA. Also what i have read on the internet, folks that were testing MultiTenant did not recommend it for production tenant because there is still a lot of bugs.

Also, if i would exported GAL from one tenant and export it to another, this issue would be resolved? No more warnings?

Thanks for your help