Open Source OLM to PST Converter The Microsoft Outlook application on Mac uses OLM file formats to save its different data. However, this Outlook application on Windows OS uses PST file format to store different information and data. But, sometimes people use different operating systems to access Outlook accounts.
The Microsoft Outlook application on Mac uses OLM file formats to save its different data. However, this Outlook application on Windows OS uses PST file format to store different information and data. But, sometimes people use different operating systems to access Outlook accounts.