Subject: Out of Office Assistant Disappears from the toolbar

CAUSE
=====
 
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.

========== 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.
 
WARNING: Using Registry Editor incorrectly can cause serious problems that
may require you to reinstall your operating system. Microsoft cannot guarantee
that problems resulting from the incorrect use of Registry Editor can be solved.
Use Registry Editor at your own risk.
 
For information about how to edit the registry, view the "Changing Keys and
Values" Help topic in Registry Editor (Regedit.exe) or the "Add and Delete
Information in the Registry" and "Edit Registry Data" Help topics in
Regedt32.exe. Note that you should back up the registry before you edit it.
If you are running Windows NT, you should also update your Emergency Repair
Disk (ERD).
 
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.