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OST Integrity Check Tool
From time to time, you may get error
messages when synchronizing your Offline folder (.ost)
file in Microsoft Outlook with your mailbox on a
Microsoft Exchange server. Or, you may notice that some
items are missing from your .ost or from your mailbox
after you synchronize the two.
Scanost.exe scans your .ost file and
your mailbox on an Exchange server, comparing items and
folders in each. If the tool finds any differences
between the two sets of information, it will attempt to
reconcile them. The tool records these differences in a
scan log so that you can see what discrepancies it found
and resolved. The scan log also identifies any
situations the tool couldn't correct that you'll need to
fix manually.
Scanost.exe is installed when you
install Outlook and is located at:
drive:\Program Files\Common Files\System\Mapi\1033\
or
drive:\Program Files\Common Files\System\MSMapi\1033\
For detailed information about running
the tool, understanding messages it displays, reading
the scan log, and manually resolving issues the tool
couldn't resolve, see the readme file, Scanost.txt, at
the same location.
Note The Inbox repair tool
(Scanpst.exe) is another tool you can use to diagnose
and repair errors in your .ost file. However, the Inbox
repair tool scans only the .ost file, making sure that
the file structure is intact. It doesn't scan your
mailbox on the Exchange server. Use the Inbox repair
tool if you have problems opening your .ost file. Use
the .ost integrity check tool if you get error messages
when you synchronize your .ost file with the Exchange
server. | 
