Email is deleted from server using Microsoft Outlook 2016 when downloaded via POP3
Does your smartphone, tablet or webmail no longer shows all your emails or do they appear for a short time and then disappear?
If you have configured Outlook 2016 to Leave a copy on the server and also set the option to remove from the server after so many days, you may experience email message being deleted from the server as soon as they are downloaded to Outlook
Quick fix – Remove the tick from ‘Remove from the server after <number> of days
Solution – Update Office 2016 to version 16.0.6568.2036 or later
see https://support.microsoft.com/en-us/kb/3145116 for full details