Unable to open delivery reports in Exchange 2013 SP1. Gives warning "The status for the recipient can't be determined because of a temporary error. Please try again later."

This seems to be occurring with all users (have tested a few, all display the same exact error message).

When I click on "Message Delivery Report" in Outlook 2010 or 2013, it points me to the ECP and displays this message "Warning The status for the recipient can't be determined because of a temporary error. Please try again later." I'm not sure which log files to look at. The last time I remember it worked was before I applied SP1, I think CU3.

Our environment is two servers running Exchange Server 2013 Std. SP1 (847.32) in a DAG.

Thanks.