To test round-trip delivery, the destination mailbox must be configured to automatically forward the message back to the originating mailbox, thus enabling the Round-Trip Delivery counter in the test. For the test to recognize the returning message, the original subject line must be inserted in the subject or body of the returning message.
For External Message Delivery Health tests, if the test source mailbox is hosted on an Exchange 2010/2013 mailbox database, the Exchange organization must have at least one available Exchange CAS server that exists on the same site as the active mailbox database copy.
You can create user mailboxes or dedicated test mailboxes for source and target mailbox pairs to allow both DAG and non-DAG database mailboxes. You can create one or more test mailboxes on each mailbox database.
For information about creating test mailboxes for Exchange 2010 or 2013, see . For information about creating test mailboxes for Exchange 2007, see .
The OWA Availability Health uses a Microsoft PowerShell cmdlet called test-OwaConnectivity to test OWA availability. For this cmdlet to run, you must create at least one test mailbox using the Microsoft PowerShell cmdlet called new-TestCasConnectivityUser. For more information about this cmdlet, go to .
You must create one or more test mailboxes on a Mailbox server to perform this test. It is recommended that you set the accounts created for test mailboxes to have “password never expires”. This setting prevents logon failures due to a password expiring.
UC Diagnostics uses a PowerShell script to simplify creating test mailboxes for Exchange 2007 servers. You must create mailboxes for the Exchange 2007 OWA Availability Health test using the PowerShell cmdlet called new-CASConnectivityMailbox.
UC Diagnostics uses a PowerShell script to simplify creating test mailboxes for Exchange 2010 servers.Mailboxes for the Exchange 2010 OWA Availability Health test must be created using the PowerShell cmdlet called new-CASConnectivityMailbox.
Ensure all database copies of the mailbox database are in the same site as your CAS server. The PowerShell cmdlet used in the test requires a test mailbox for each site. This guarantees you always have a test mailbox in the site, even when databases fail over/switch over among member servers of the Database Availability Group (DAG).