Hi,
Are you using Outlook desktop client? If so, please make sure you have upgraded your Outlook to the latest version.
Can these emails be searched? Also, please go to your web mail and see if you can see these messages.
What's the type of your account? Exchange, IMAP or POP?
- If you are using an Exchange account, please go to click Folder > Recover Deleted Items and see if you can find the messages here. If they are here, just select them and Restore them.


- If you are using an Exchange account and these emails can be found on your web mail, please go to Outlook client and click File > Account Settings > Double click your account > Check if you have set Outlook to only sync messages within two weeks.

- Please make sure you have not enable AutoArchive for Inbox: Right click Inbox > Properties > AutoArchive. If you have set AutoArchive for Inbox, these emails may be archived to a PST file and you can see the path in AutoArchive page.
- Besides, it is also suggested to check if you have set any rule which may lead to this issue. If there are multiple rules or you have difficulty finding the culprit one, please turn off all rules via File > Rules & Alerts and see if the problem
still exists.
Hope this can be helpful.
Regards,
Aidan Wang
Please remember to
mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact
tnsf@microsoft.com.