Microsoft Teams allows you to block problem or spam callers numbers from Call History. Once you do this, inbound callers from that number will be ignored.

Step 1: Go to your Calls tab within your Teams application and select the History option (this can be done on your desktop PC or mobile client)



Step 2: In your calling History find the number you want to block. Once found, select the 3 dots (ellipses) on the right hand side of the number and select the Block option (as seen in the picture above).



You can centrally manage all the numbers you have blocked from Settings -> Privacy. From there, under Blocked Contacts you’ll see an option to “Edit blocked contacts“. Select that to see the list of the PSTN numbers you’ve blocked.

Note: You’ll also notice that you have the option of blocking all calls that don’t have a Caller ID



Use the “X” to remove any numbers from the blocked list: