How can I import EML files to Microsoft 365 on Mac? You can easily import EML files to Microsoft 365 on Mac OS / OS X by using the latest EML file to Microsoft 365 importer for Mac all along with complete EML / EMLx files Meta tags, attachments, images, signatures, etc. Batch import EML files to Office 365 location also can be done by using the latest EML file to Microsoft 365 importer for Mac. Download the free EML Importer for Mac tool to test its working process, it support 20+ files at a time.