Adding a shared calendar to a Team

Hi,

I'm struggling with the fact that for some of our Teams, there is a shared calendar, automatically showing up in Outlook for every team member, but for some Teams there isn't.

When I go to Team settings and try to add an app, there's no such thing as an app called "Outlook", "Calendar" or "Groups". However, if I go into "Files / Open in SharePoint" and then hover over the team name in the Sharepoint view of the team I can see a difference on these teams when I look under "connected apps". The teams that have a shared "group calendar" in Outlook seem to have the apps "Outlook", "Calendar" and/or "Groups". But again, I can't seem to be able to add these apps to the teams that lack these apps.

I have succeeded to create a new team that has the "Groups" app connected, through following these steps:

1. Create a group in Outlook ("Add new group")
2. Create a Team in Teams and choose "From Office 365 Group"

This team will have the App "Groups" connected to it, and thus, a shared calendar will show up in Outlook automatically for all the team members.

Now my problem is that I have a team with a lot of members, that doesn't have the "Groups" app connected, but they need the shared calendar. How do I do this?

I know that one solution is to create a new team following my own steps above, but then we'll loose all the chat history in the channels, and there's a lot of admin work to move all the files, etc.

I know that another solution is to add a "page" that is a calendar in the Sharepoint view of the Team, but that doesn't seem to create the same kind of calendar - it doesn't seem to automatically show up for all the team members in their Outlook calendar view.

Looking forward to any pros that can help me figure out how to solve the basic problem of having a shared calendar for our team.