The Exchange Internal Outlook Web Access Availability Health test verifies that a user can log on to a mailbox through Outlook Web Access (OWA) from inside your organization. This test uses internal server URL names only. It does not test external availability or OWA using your public URL.
This test does not run on Exchange 2013 or later because the Microsoft Exchange Management Shell does not support OWA Connectivity testing for these versions. For Exchange 2013 or Exchange 2016, you can use the Exchange System Health test to monitor OWA health.
For Exchange 2010 Client Access (CAS) servers, UC Diagnostics attempts to log on to Exchange 2010 mailbox in the same site, if one exists. For Exchange 2007 Client Access (CAS) servers, UC Diagnostics attempts to log on to either:
The Internal OWA Availability health test for Exchange 2007/2010 does not use specified alternate credentials. Before you run this test, use the Exchange PowerShell script (provided by Microsoft) to create test mailboxes. This test automatically manages mailbox credentials while it logs onto the mailboxes. For more information, see the Unified Communications Diagnostics User Guide.
Create at least one test mailbox. For more information, For information about creating test mailboxes, see the Unified Communications Diagnostics User Guide.
The External OWA Availability health test monitors the availability of OWA functionality in your organization through an external URL. This test uses an external or an internal URL. This test verifies that the users associated with the alternate credentials can logon to their mailboxes through an external OWA URL. If an external URL is specified, ensure that the DNS server can resolve this URL.
This test is only applicable to organizations with at least one Exchange 2007 or Exchange 2010 server. This test does not run on Exchange 2013 or later because the Microsoft Exchange Management Shell does not support OWA Connectivity testing for these versions. For Exchange 2013 or Exchange 2016, you can use the Exchange System Health test to monitor OWA health.
This test uses mailboxes associated with alternate credentials. You must explicitly choose the alternate credentials on the Test Settings page when you create this test. You cannot configure test if you have selected the Use Diagnostic Services Credentials option.
If you want to test External OWA functionality using both types of mailboxes, you must configure two tests - one using credentials of the user who has 2007 mailbox, and the second using credentials of the user with 2010 mailbox.
The Exchange Replication health test allows you to monitor the overall health of your transaction log replication on your Exchange 2007, Exchange 2010, Exchange 2013, and Exchange 2016 mailbox servers.