Microsoft Exchange Server Mailbox Manager failed to send the following message:Subject: %1Recipient: %2Error: %3

This Error event occurs if Microsoft ® Exchange Server cannot send Exchange Mailbox Manager reports to the recipient listed in the description of this event. Possible causes of this error are the following:

• The mailbox is disconnected.

• There are message size restrictions on the mailbox or mailboxes.

To resolve this error, do one or more of the following:

• Make sure that there is a mailbox connected to the recipient object specified in the event description.

• Make sure that message size restrictions are not preventing Exchange from delivering Mailbox Manager reports to the recipient specified in the event description.

• Restart the Exchange System Attendant service.

For more information about resolving this error, see Microsoft Knowledge Base article 322062, XADM: Mailbox Manager Does Not Send Reports and Does Not Log Any Error Messages.