Using the New Outlook for Mac for personal email and calendar
The .olm file should be imported from Outlook for Mac, not by selecting it as a folder in Finder.
For Outlook for Mac, the supported import path for an .olm file is:
- Open Outlook for Mac.
- Go to the Tools tab and choose Import.
- In the Import box, select Outlook for Mac archive file (.olm), then choose Continue.
- Locate the
.olmfile on the Mac and choose Import. - The imported items appear under On My Computer in Mail, Calendar, People, Tasks, and Notes.
In this case, the file being greyed out usually means Outlook is not accepting that selection through the current import path. Also, if On My Computer is hidden, enable it in Outlook > Settings… > General, then clear Hide On My Computer folders.
A key limitation: Outlook for Mac can import .olm and .pst archive files, but it cannot import Outlook on the web contacts or calendars, iCloud contacts or calendars, or Google contacts or calendars directly through this feature.
References: