Please check to see if the "X1 Outlook Addin" is listed. You'll find it here:
1. Open Outlook and navigate to Tools > Options > Other > Advanced Options > Com Add-Ins
- If "X1 Outlook Addin" is listed but not checked, please check it and restart Outlook.
- If "X1 Outlook Addin" is not listed, click on the Add button and add it manually. You'll find it at (assuming you installed X1 to the default location): C:\Program Files\X1\X1Outlook.dll