Not able chat from external domain from MS Teams

Question

Hello Teams Community,

Please i need your help on this issue.

We are not able to chat with external domains and we are not able to change the setting in Coexistence mode from Islands to the team only as shown below:

Answer 1

This problem is addressed here with solution:
https://learn.microsoft.com/en-us/microsoftteams/troubleshoot/teams-administration/cannot-switch-to-teams-only-mode

To allow external contact you can check these settings:
https://learn.microsoft.com/en-us/microsoftteams/manage-external-access

-------------------------------------------------------------------------------

If this was helpful, please Upvote and Accept Answer.Else, please Comment with further information or related questions.