There are numerous OST file utilities, to handle a variety of tasks, and there are a multitude of reasons to use them. Recovery of deleted records, emails from corrupted accounts, access to backup copies for deleted accounts, are just a few I have run into within the last year. In-house exchange server crashing with improper backups is another I've seen a long time ago.
The files can become corrupt, server data can be incorrect....So try to open this file here
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