How to test Exchange search for Outlook user in online mode
This test is for online mode users only. Cache mode users use windows desktop search to search mail
use the command below to test exchange search on the server for a specific user
Test-Exchangesearch -id user@contoso.com
if test returns true, indexing is working fine. if false, then indexing needs to be reset with powershell or manually by restarting MS Exchange search service
OR
test against a mailbox database by typing
Test-ExchangeSearch -MailboxDatabase "databasename" -indexingtimeout 30