The Isinteg.exe tool is running in a dismounted mailbox store on a server that is running Microsoft Exchange Server 2007. Additionally, the Microsoft Exchange Transport service is running on the Exchange 2007 server. When you send an e-mail message to a mailbox that is included in the dismounted mailbox store, you receive the following non-delivery report (NDR) message:
Your message did not reach some or all of the intended recipients. Subject: xxxx Sent: <time> The following recipient(s) could not be reached: firstname.lastname@example.org on <time> The message reached the recipient's e-mail system, but delivery was refused. Attempt to resend the message. If it still fails, contact your system administrator. <test.com #5.2.0 smtp;550 5.2.0 STOREDRV.Deliver: The Microsoft Exchange Information Store service reported an error. The following information should help identify the cause of this error: ......
When the mailbox store of the destination mailbox is dismounted to run the Isinteg.exe tool, the message is queued in the recipient's local delivery queue. However, Exchange 2007 marks the delivery as a permanent error. This causes the 5.2.0 NDR message.
To resolve this problem, install Update Rollup 3 for Exchange Server 2007. For more information about Update Rollup 3 for Exchange Server 2007, see the following Exchange Help topic: