|Source:||MSExchangeIS Mailbox Store|
|Component:||Microsoft Exchange Information Store|
|Message:||<function name> returned error <error code> on database <name>|
This event can occur in a situation where there are corresponding mail processing problems. The event category is “MTA Connections.” There could be related events preceding or succeeding this event, which indicates that a function call failed. This could be a transient failure that may disappear after a while.
If this event is accompanied by message processing failures, ensure that the latest service packs for Exchange Server have been applied. If the issue persists, contact Microsoft Product Support Services.