|Component:||Microsoft Exchange Extensible Storage Engine|
|Message:||<process name> (<process id>) <number>Error (<error code>) during backup of a database (file <file name>). The database will be unable to restore.|
An error occurred during the online Exchange-aware backup of an Exchange Information Store database.
The cause for the online backup failure depends on the error listed in the Description section of the event. The most frequent causes are listed below.
Other causes are under investigation. If you have exhaustively checked all hardware-related causes, contact Microsoft Product Support Services.