Anyone any ideas on how I can migrate my email from the Mac (.olm) to Office 365?
Thanks
You can take help of this third party http://www.converter.olmtooffice365migration.com tool to successfully migrate your all OLM file to different file formats like DBX, MBOX, IMAP, TXT, RTF, EML, MSG, HTML, and MHTML apart from PST.
Did you manage to get this resolved?