I had a similar issue and Microsoft support was able to correct using the
following steps:
The issue may be related to the following situation.
1. Corrupted Cache file
2. Corrupted Profile
3. Corrupted Business Contact Manager.
I would like you to perform the following steps.
Rename Cache files
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If the problem still occurs, it is probable that the Outlook cache files are
corrupted. Let's perform the following steps to see if we can solve the
problem.
Perform a search on your computer to find the following files:
extend.dat
outcmd.dat
frmcache.dat
views.dat
NOTE: Some of them may not exist, but it should not matter. You may also
need to show the extension of the file and enable the "show hidden files"
option in "Folder Options". To do this, please perform the following steps:
a. Start-->Control Panel
b. Click Folder option
c. Click "show hidden files and folders" in the View tab
d. Click "Start", point to "Search"
e. Click "All Files and Folders" and click "More Advanced Options" and make
sure the following options are checked:
--Search System Subfolders
--Search Hidden files and folders
--Search Subfolders
f. In the "All or Part of the File Name" box, type one of the above files'
names and click "Search".
g. Right-click the file and rename the files.
"extend.dat" To "extend.old"
"outcmd.dat" To "outcmd.old"
"frmcache.dat" To "frmcache.old"
"views.dat" To ¡°views.old"
NOTE: If you cannot rename the files, simply back them up to another folder
and then delete them.