ERROR: "The command is not available" error message when you launch Outlook.

Problem:

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."

Resolution:

There are two ways to go about fixing this problem.

Method 1:

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.

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