Team type OKR's can be jointly owned by different users from a single team or the number of teams added while creating the OKRs.
All the assigned owners jointly-owning the OKRs will receive notifications every time someone adds a comment, does a check-in, for a missed check-in provided missed check-in email notifications are enabled in the profile settings and also for approaching due date based on the opted selection in profile settings section.
A maximum of 10 Users and Team can be added to jointly own the Objective along with its associated OKRs.