How to create a Teams site that includes a calendar
Teams does not have a familiar built-in calendar function. You can create a Microsoft 365 Group, then Create a Teams site from that Group. The calendar is technically separate but it will have the same name as the Teams site.
Important - this process will not add a calendar to an existing Teams site.
Instructions
Create a new Office 365 Group in Outlook. Add as many members as you see fit.
Wait about 15 minutes.
Build a Teams site from your Group
Open Teams and choose “create or join a team”. When prompted, select “create a Team from an existing group”
If you waited >15 minutes then Teams should recognize the Group you previously built.
Select that group. If you don’t see the previously created Group, wait a few more minutes.
Get your Group calendar URL
Log into portal.office.com from your favorite browser
Open the web version of Outlook
Open the Group name on the bottom left → click the “Go to the group calendar” icon
Copy the URL from the top of the browser
Add the URL to a “Website” tab
Open Teams
Browse to the Teams site and channel you want to host the calendar; I like using the General channel for apps and calendars that should be visible to everyone in a Teams site.
Click the + sign at the top of the channel to add a new tab
Choose the “Website” app
Give the calendar a name, and paste the URL into the appropriate field
Click OK
You should now have a calendar that’s visible in your Teams site and accessible to everyone in your Team.
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Create a Team, Add/Remove Team Members and Owners, and Organize your Teams List