You can archive a folder's E-Mail messages that are older than 90 days. The E-Mail messages are moved to the Archive folder. The Archive folder contains a separate subfolder for each calendar year. The archived E-Mail messages are saved to those subfolders sorted by the year of receipt. The Archive folder is created as soon as you initially use this function.
How to archive an E-Mail folder's content:
Select an email folder in the folder tree.
In the Archive messages window click on .