Outlook for Mac At the bottom of While Office 365 archiving is able to import these PST files into a Personal Archive Folder, the problem persists because the storage continues to swell and its cost continues to rise. After that, one can utilize Outlook application to move emails, contacts, and calendars into PST file format. Hello, Exchange 2013 (on premises), Outlook 2016. When you open Outlook for the first time, you will be asked to enter your Apple ID password once again. how to archive calendar in outlook 365 Also, select the option most suitable.