Solution to Fix “The File Username.ost is in Use and Cannot be Accessed” in Outlook
Summary: The file yyy.ost has been used and cannot be opened is a common error message for an OST file, which is an Outlook data file. This can be fixed by using GainTools Converter for OST to convert the problematic OST file to PST format. There are a few troubleshooting techniques, nevertheless, that you can…
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