Block ALL EXTERNAL TEAM contacts from messaging users in your't%20find%20any%20previous%20conversations%20on%20this%20specifically.%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EMy%20question%3A%20%3CSTRONG%3EHow%20can%20we%20BLOCK%20ALL%20EXTERNAL%20contacts%20from%20messaging%20our%20INTERNAL%20contacts%20in%20MS%20Teams%20(Cloud)
New Contributor

Greetings Folks,


I am new to the community and apologies if this has been answered already but I couldn't find any previous conversations on this specifically.


My question: How can we BLOCK ALL EXTERNAL contacts from messaging our INTERNAL contacts in MS Teams (Cloud)? For example, only domain users could talk to other users. Any other chat requests from will be blocked by default. 


I ask because I think this could pose a security risk and various other reasons.  Thanks for reading and sharing your comments in advance.  



IT Guy

3 Replies
Best Response confirmed by minja20 (New Contributor)



Chat can be disabled for all Guest users using the settings in the Teams Admin Center.  See


for more details.

Beside the ability for guest users you should also configure the federation capability to meet your needs.