...
Enable the Admin mode and go to Settings
Go to the Integrations tab
Click on the Enable Integration button
Fill in the details from your Microsoft account (Application (client) ID, Object ID, Directory ID, and Client secret)
Confirm
Sign into your company’s Microsoft account
Accept the permission request from Microsoft
If successful, the integration will be enabled and you’ll see a success message
...
Disabling Integration
To disable a Microsoft Outlook Integration, you need to:
Enable the Admin mode and go to Settings
Go to the Integrations tab
Click on the Disable Integration button and Confirm
If successful, the integration will be disabled and you’ll see a success message