In Outlook 2013: Click File > Info > Clean up Tools > Archive
In Outlook 2016: Click File > Info > Tools > Clean up old items
Click the Archive this folder and all subfolders option and choose the folder you want to archive
Under Archive items older than, enter a date.
You can create multiple .pst files if you want to archive some folders using different settings. For example, you may want to keep items in your Sent folder longer than items in your Inbox folder.
Check the Include items with “Do not Auto Archive” checked box to archive individual items that are excluded from automatic archiving. This option doesn't remove that exclusion from these items, but instead ignores the Do not Auto Archive setting for this archive only
Click OK
Turn off Auto Archive
To archive only when you want, turn off Auto Archive.
- Click File > Options > Advanced.
- Under Auto Archive, click Auto Archive Settings.
- Uncheck the Run Auto Archive every n days box.