Microsoft Connection Failures

Problem

When configuring Microsoft® as your mail provider, a Connection unsuccessful error message displays after you click Connect:

Connection unsuccessful. Please close this window and try again.

Cause

The Application (client) ID and Client Secret combination for your Microsoft Entra® ID (formerly Microsoft Azure®) app are invalid.

Solution

Create a new app via the Microsoft Entra ID portal. Make certain to copy the Application (client) ID and Client Secret Value correctly.

For steps, see Use Microsoft for System Mail.
troubleshooting microsoft mail-providers

Last modified: October 29, 2024