Using older versions of Outlook for Mac for personal email and calendar
Quick fix:
I can confirm that removing an Active Directory / Exchange account and adding it again (without having to change to the new Outlook!) restores the search index and makes it possible to search in outlook. The method to do this is:
- Tools->Accounts, select the account you want indexed and remove it with the "-"
- Keep in mind that this takes a moment and emails that are not on the server would be removed
- Select the "+" sign from the Tools->Accounts dialog and re-Add the account, logging in as necessary (though your credentials would remain if you had them cached with Keychain)
Now select your inbox and the search should be restored as it forces the search index to be rebuilt based on the "new" emails being loaded.