Forum Discussion
Creating a Department shared Calendar in Office 365?
If I made a shared mailbox essentially I would be creating a user in Office 365 with a general name like "Purchasing" and then share that user's calendar out to all the users I want? Can you get granular with the permissions with a shared mailbox?
Sorry if I'm getting detailed here.
If you need it to auto-appear on Outlook and mobiles, you don't have much choice. Groups-based calendar will be easiest to handle for end-users, as newer versions of Outlook feature the "All Group Calendars" node where it will appear automatically. But Outlook mobile still doesn't have support for Group calendars. And as Chris mentioned, you might have troubles with permissions (we do have a parameter to make the calendar read-only for members, but it doesn't seem to be working as expected).
Shared mailbox calendars can now be opened in Outlook mobile, but both on the desktop and mobile it's a manual process and you will need to instruct the users accordingly. The other benefit is that you can get very granular with permissions. And you can even publish the calendar/embed it on a webpage or "tab" it in Teams. But it adds some management overhead overall.
PF-based calendar is another common option, but there is no way to access those on mobiles.