OLM files are archive files created by Mac Outlook and used to store offline data. There is a higher chance that this file will become corrupted since it is stored locally on your Mac system. Import OLM to Apple Mail to protect against such issues.
It will prevent any mismanagement of OLM files.
A manual solution and an advanced Mac OLM Converter can be used to import Outlook OLM to Mac Mail.
I always recommend MacSonikOLM converter for mac product because if you are the non-tech user It will beneficial to you to convert OLM File in just a few steps and it allows you to convert single as well as multiple files like Convert OLM files into PDF,
PST, EML, MSG, TXT, HTML, MBOX, DOC, CSV, and more file formats.
https://www.macsonik.com/olm/converter/
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