1. Go to File > Options.

2. In the Advanced section, click the AutoArchive Settings… button.

3. Choose the AutoArchive options you want or don't want. Here you'll be able to turn off AutoArchive (uncheck the box next to "Run AutoArchive every [X] days") or change its frequency, determine how old items have to be before they're archived, and set old items to be deleted instead of moved to an archive .pst file.

4. Click OK to save your changes.

How to Manually Archive Email in Outlook 2016

Whether or not you have AutoArchive enabled in Outlook, you can archive items manually--a good way to clear out your inbox while still saving messages in case you need them later. Follow these steps to do this in Outlook 2016:

1. Go to File > Click on Tools.

2. Click Cleanup Old Items

3. Choose the folder you want to archive. Outlook will save that folder and all the subfolders beneath it. 

4. Select your archive options such as item date, then Click OK.