Exchange Databases Fail to Mount with 0x97E
If you run into a scenario where your Exchange databases are failing to mount with either of these errors, first reference this Technet article . Assuming that doesn't apply then manually start the System Attendant (MSExchangeSA) service on the machine
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Read the complete post at http://briandesmond.com/blog/exchange-databases-fail-to-mount-with-0x97e/