Hi Larry,
Can you still see the emails if we view them in OWA?
>>An advance search within the account has proven zero results.
When searching, did you set the searching scope to all folders?
Do you have any antivirus/security software installed? These antivirus/security program always integrates itself into Outlook and may cause some unexpected behavior in Outlook. I'd recommend you disable its integration in Outlook and then see if this issue
continues. If you don't know how to do it, you can contact the support of the security program.
We may also try starting Outlook with /cleanviews switch in case these emails were hidden by filters. To do this, press Windows key + R to open the Run command, type
outlook /cleanviews and press Enter.
In addition, do you have your email account synced with other devices, such as a mobile phone? If so, please try temporarily disable the synchronization and then see the result.
Regards,
Steve Fan
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