Authenticating with Atlas in the MS Teams desktop app isn't working

Issue Summary

Authenticating with Atlas in the MS Teams desktop app isn't working and is throwing the "Could not connect to Microsoft Teams" error message.

Steps to Reproduce

1. Go to the MS Teams desktop app
2. Add the Atlas app
3. Click "Login"

Expected Results

You authenticate with Atlas in the pop-up window successfully. 

Actual Results

The pop-up window shows the "Could not connect to Microsoft Teams" error message.

Workaround

Authenticate with Atlas in MS Teams in a browser. After authenticating, switch back to the desktop app as the integration works as expected afterward.