Troubleshooting AD Connect
The Refresh and Test buttons in the AD Connect Setup Tool are the first step in troubleshooting any issues you might be experiencing:
Refresh
AD Connect will automatically check for new or updated domain settings every 30 minutes. Click this button to force an immediate refresh.
Test
This button will verify the connection to GravityZone Security for Email and validate all credentials entered in the Setup Tool.
If this does not solve the problem, check that the AD Connect service is running:
Go to Task Manager by right clicking on your Windows taskbar and clicking on Task Manager.
Look for The AD Connect under the Services tab.
Right click on the Service and restart it.