Good morning,
We have an issue regarding two shared mailboxed that has been migrated from Exchange 2013 to Office 365, let's call them "Shared1" and "Shared2".
We have a local Exchange 2013 server (CU9) on site and we have split DNS for the namespace.
When users are connected to the corporate network and are using internal DNS, the content of "Shared1" is the same as "Shared2". When users are on an external network and using external DNS, the content of "Shared1" is as expected, but we have to set up a new profile or run repair on an existing one to fix it.
When checking the mailboxes via OWA, the content is always as expected.
Any comments or help regarding how to troubleshoot this issue is much appreciated. Thanks!