One of the reasons behind emails disappearing from Outlook is unintentional deletion. Thus, if you are unable to find a few emails in your Inbox in Outlook, you can first check the deleted items folder. In case, you have deleted an important email, it won’t be deleted right away but will be available for you in the Deleted Items folder.
Why are my emails not showing up in outlook?
The view settings on Outlook might be tampered with. You could be looking for wrong email subjects or senders. The native firewall could have blocked or removed the mails. The Outlook PST file might be deleted unintentionally. The Outlook’s server could be unavailable or any other syncing issue.
One way to consider this is though, one of the reasons why Outlook 2016 emails keep disappearing from folders could be all these existing filters. The best way to fix it instantly is by just getting rid of all the filters from Outlook. Just go to the View Settings > Advanced settings and access the existing Filters from here.
The next thing we wanted the answer to was how to recover emails that have disappeared from Outlook?
My answer was below are the steps to use it in recovering emails that most have disappeared from outlook. Junk email folder or deleted items folder should be selected on the left panel. Any of the following should be done: The message that you would like to get recovered should be selected. After that, Recover should be selected.
Why do some or all items disappear from a given folder?
Some or all items disappear from a given folder in Microsoft Outlook. This occurs either immediately or after a set, consistent time period. This issue occurs if a filter was applied to the default view settings of the Outlook folder.