Currently within the community, the Partner Manager can assign a task to only one user, is there any way to assign it to all the Partner Users in the Partner Account?
2 answers
Jonathan Fox (Cooper Parry) 
Forum Ambassador
- From Setup, enter Activity Settings in the Quick Find box, then select Activity Settings.
- Select Allow users to relate multiple contacts to events and tasks.
- Click Submit.
- To show related contacts on event and task detail pages, ensure that the Name related list is included on event and task page layouts. The items in the Name related list aren’t fields, so they don’t adhere to field-level security settings.
If you can't do this to the users, you could do it to the users contact record for them to see.
https://help.salesforce.com/articleView?id=activities_enable_shared_activities.htm&type=5
in this way you can assign task to group .
