process name (process id) file nameThe log range read from the file “value” at offset value for error code bytes failed verification due to a range checksum mismatch. The read operation will fail with error %7. If this condition persists then please restore the logfile from a previous backup. For more information, click http://www.microsoft.com/contentredirect.asp.

Details
Product: Exchange
Event ID: 477
Source: ESE
Version: 6.5
Message: process name (process id) file nameThe log range read from the file “value” at offset value for error code bytes failed verification due to a range checksum mismatch. The read operation will fail with error %7. If this condition persists then please restore the logfile from a previous backup. For more information, click http://www.microsoft.com/contentredirect.asp.
   
Explanation

You may not be able to mount an information store database.

   
User Action

Locate a good copy of the damaged log file. Another copy may exist on either an Exchange online backup or recent server backup.

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