Imagine you have an Exchange 2007 Sp1 environment, and you have just updated every Exchange server with RU7, and then you notice that when internal people receive a system-generated message, they don't seem to be sent anymore by Microsoft Exchange, but by a user called MicrosoftExchange329e71ec88ae4615bbc36ab6ce41109e?

Prior to RU7, any system-generated message delivered to internal users (like journal reports, quota messages, and delivery status notifications) would look like this:

And after deploying RU7, it looks like this:

Here's the official response from Microsoft regarding this issue:

Unresolved sender for delivery status notifications after applying update rollup 7 for Exchange Server 2007 Service Pack 1

A solution will be included with RU8, which will be released when it's ready :-)

Remember that you can set a MicrosoftExchangeRecipientReplyRecipient, that will receive any mails sent in reply to those system-generated messages. In the following print screens I'm setting the MicrosoftExchangeRecipientReplyRecipient to my administrator's mailbox, as can be seen after replying to some of the system-generated messages.

To set the MicrosoftExchangeRecipientReplyRecipient, you need to use the Exchange Management Shell cmdlet Set-OrganizationConfig.

- Ilse