.OLM File Extension
File TypeMac Outlook Database File
This file is saved in a binary format, which requires a specific program to read its contents.
What is an OLM file?
Database file used by Microsoft Outlook for Mac; used as the software's internal format for storing email messages, contacts, journals, calendar data, and other user application data.
OLM files are used only by Mac Outlook and can't be opened by the Windows version of Outlook because the Windows version uses .PST files rather than the OLM format. To open OLM files in Windows, you can first convert the OLM file to the PST format with and then open in it Outlook.
NOTE: The Stellar Phoenix OLM Repair tool is designed to repair corrupt Mac Outlook OLM files. The program can help recover emails, calendars, address books, attachments, notes, and tasks.