CExBackup::backupFile:WriteFile: Error Number 0x6: The handle is invalid

If you see this error message: "CExBackup::backupFile:WriteFile: Error Number 0x6: The handle is invalid"

This error usually occurs when backing up a Microsoft Exchange server and it has a problem writing to the Temporary directory specified. Please ensure that the system account running the Microsoft Exchange backup has full access rights to the directory (See This Article). If it is pointed to a network drive, please use the UNC path name (e.g. \\server\share\tempfolder) instead of the mapped drive letter, and then make sure the “Network Resources Authentication for Windows” listed for the backup set is properly configured.

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