User was migrated from Exchange 2010 to Exchange 2016. When the user searches for mail in Outlook or OWA, only results for mail that was sent/received after the migration date is returned. All of the mail was successfully migrated, and you can browse to it and view it manually, it just doesn't show up in search.
Setup is four Ex2016 servers, consisting of two DAGs with two servers in each.
Known User Scope
- Affecting multiple users across different databases on the same server.
- Some users on a different server are not affected.
- Affected user has issue regardless of which server the database is active on.
Unknowns
- Whether all users on this server are affected.
- Whether any users on other servers are affected.
I have stopped the Search services on the server, deleted the {guid} index folder in the edb path, started the services, and then waited for the index to be rebuilt and reported as healthy. After these steps, the issue still persists.