When you try to use the "Out of Office reply" option is Microsoft Outlook you receive the following error:
"The command is not available. See the program documentation about how to use this extension."
There are two ways to go about fixing this problem.
From Outlook, select Help > About Microsoft Outlook > Disabled Items. Select "outex.dll" and click Enable. If this does not fix your issue then try method 2.
- Ensure Outlook is closed (and outlook.exe process is not running)
- Launch Regedit
- Remove HKCU\Software\Microsoft\Office\11.0\Outlook\Resiliency key
- Close Regedit
- Launch Outlook