Call2Teams - Customer
When clicking the Sync Now button, the authentication window does not pop up and the following red error is shown:
Explanation of Behaviour
This error occurs when the sync process initiates, and an authentication pop-up window is needed to enter Microsoft 365 credentials (username & password).
The error explains that the popup window was closed prematurely before the authentication had taken place, either through manual action (closing the window purposefully) or due to a browser security setting preventing pop-up windows.
This issue is entirely connected to the web browser and policy settings.