Got a weird issue. When attempting to log in to another user's mailbox via OWA, I receive the following error:
Your mailbox appears to be unavailable. Try to access it again in 10 seconds. If you see this error again, contact your helpdesk.
I have tried this two different way.
. I get the log in page, but after entering the credentials, I get the error.
2. Log in to OWA as myself, choose my name in the top right, type in the mailbox I want to open, then get the error.
I have verified that the permissions are correct for the mailbox I am trying to access, and this used to work. I have also verified via Test-ServiceHealth that required services are running. Application logs don't show anything that relates to this error.