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

Connection unsuccessful. Please close this window and try again.

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

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

For step-by-step instructions, see:

• Setting Up Microsoft As Your Mail Service Provider
• Setting Up Importing via Microsoft