What is OLM File Extension?


An OLM file can be accessed on MS Outlook 2011 for Mac. The file extension is widely used for MS Outlook to store a number of data including Contacts, Messages, Emails, Notes, Journals, Task, Calendar and much more. Users have to understand the fact that MAC Outlook stores its data in a database file. It doesn't store data in OLM file. It allows users to export the stored data in OLM.

Size of OLM

It is debatable. The capacity of the file format is unknown but users of the file extension believe that OLM doesn't hold more than 2 GB database.


It is associated with database files.

Supportive Apps

The file format is supported by only MS Outlook 2011.

MIME type



It is saved automatically in documents.

~/Documents/Microsoft User Data/Office 2011 Identities/Main Identity/

How to open or view OLM File Extension

Users can view OLM files using Outlook for Mac or any paid or free tool.

Suitable conversion from OLM