We have 2 CAS/HT servers (1 CAS array), 2 MBX servers (1 DAG) and 1 archive server. All Exchange servers have SP3 CU5 installed.
Recently we deployed and configured Exchange Server 2013 CU3.
All Exchange services work as expected. We get an issue with Delivery Reports afterwards.
When we login to old version of ECP (exchange 2010) - Mail Control - Delivery Reports and specify Mailbox to search, From or TO address it shows results withfollowing warning:
"Couldn't retrieve all the message tracking results. Some of the results come from newer versions of Microsoft
Exchange, and they are incompatible with the current version."
We are able to see delivery reports, read status etc - like "Read - The message is marked as Read in the user's mailbox." but only for internal users. If we put into FROM or TO field an external email address it shows only error specified above and no results.
Search-MessageTrackingReport -Identity "email@internalmailbox" -Sender "externalEmail" -BypassDelegateChecking
The same results "Couldn't retrieve all the message tracking results .." warning and no result for external emails.
If I run Search-MessageTrackingReport in EMS 2013 I don't get a warning and can see all the results successfully.
If I login to Exchange Admin Center (Exchange 2013) - mail flow - Delivery reports I can see all the results but when I open any specific report I get error:
"400
Outlook Web App Options :(There was a problem opening Options in Outlook Web App.
Please click Sign out below, then sign in to Options in Outlook Web App again.
If that doesn't work, sign out, delete browser cookies, and sign in again."
Please advice.