Out of Office Assistant has been quite an useful tool to notify our dearest sender that we are away for a duration of time, however, when these, the beloved feature is not functional, isn’t that a pain?

What could be the reason though? Well, it usually happens in Microsoft Outlook, the Out of Office Assistant may not appear on the Tools menu. The Exchange Server Extensions Commands Add-In may not be enabled, may not have been installed, or the registry key necessary to load the Exchange Server Extensions may not have been created during installation.

Done with the wordings, now the resolution:

1. On the Tools menu, click Options, click Other, click Advanced Options, and click Add In Manager.
2. If Exchange Extensions Commands appears in the list of add-ins, click to select it.
3. If Exchange Extensions Commands is not on the list, click Install. From the list of add-ins that appears, double-click Emsuix.ecf.
4. Click OK three times to exit out of the Options pages.
5. Exit and log off.
6. Start Outlook and check to see if the Out of Office Assistant appears in the Tools menu.

If it did not install, the you need to make following registry modification for the Out of Office Assistant extension to be available in Outlook.

1. Start Registry Editor (Regedt32.exe).
2. Locate the following key in the registry:
HKEY_LOCAL_MACHINE/SOFTWARE/MICROSOFT/EXCHANGE/CLIENT/EXTENSIONS
3. On the Edit menu, click Add Value, and then add the following registry value:
Value Name: Exchange Extensions
Data Type: REG_SZ
Value: 4.0;emsuix32.dll;7;011111111111110;1111011100
4. Quit Registry Editor.

Job done and good luck.

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