You can manually run the automatic inclusion rules for groups, which can be useful after creating or modifying the rules or a group's scope. When the rule completes its execution, devices are either added or removed from the groups according to the rules you defined.
Grouping rules run every 30 minutes by default. If the group rules are currently running, your request is queued and begins after the current rule execution completes.
In Service Center, click Service Delivery > Groups.
Click Run Rules.
Click OK.