SQL Error 823 when trying to assign mailbox or perform a search. (4224503)

When attempting to assign a mailbox or perform a search error 823 is displayed.

The issue may occur performing other tasks as well.

The 823 error message usually indicates that there is a problem with underlying storage system or the hardware or a driver that is in the path of the I/O request. You can encounter this error when there are inconsistencies in the file system or if the database file is damaged.

Check your SQL server for errors or bad drives.

Refer to Microsoft KB Article ID: 2015755 - "How to troubleshoot a Msg 823 error in SQL Server"