Note: See Turn Roadmap on or off for your organization to have your Admin enable it.
After you've shared a Roadmap with an Office 365 group, you can change who you've shared it with. While you can’t remove the group you originally selected to share your roadmap with, you can add or remove members from the group.
Stop sharing a roadmap with a person
Select the person and click the X to remove them.
Note: This removes the person from the Office 365 group that you shared the roadmap with. This will also prevent them from accessing any other shared group assets such as OneNote notebooks, Outlook email, and SharePoint sites.
Share your roadmap with a new member
Start typing the person's name and then select them from the search results.
Note: This adds them to the Office 365 group. In addition to the Roadmap, any people you add also gain access to the group's shared email, sites, and other files.