Microsoft Outlook for Mac (version 16.21) is frequently unable to find email messages using the search feature, even in the case of emails that were sent relatively recently. I presume that the search index is broken.
Are any other solutions available?
Edit: There is little else to say (to increase the detail of this question), save that the emails that aren't found are seemingly at random, and are not found on subsequent searches either. I have not limited my search results in any way.