Now in the next part, we will know the method to move Outlook OLM to Windows PST, follow this article till the end. The reason to export Outlook for Mac to Windows Outlook PST may be that the user is moving from Mac to Windows and needs to access all of his/her OLM data into PST. The database contains emails, calendars, events and all the other data in the Outlook for Mac or Windows. OLM is the file type that stores the mailbox database in Outlook for Mac while PST is also a file type and it stores the database in Outlook for Windows. If you want to export Outlook 2016 from Mac to Windows then you should know the supported file types like OLM and PST in it.