1.On the Groups item, select the Administrators group, click the Permissions tab, and grant permission to acknowledge Alarms for this group. For the Operators group, block the same acknowledgment for this group.

Permission to acknowledge Alarms allowed for the Administrators group

Permission to acknowledge Alarms denied for the Operators group

2.On the Permissions tab of one of the users of the Operators group, grant permission to acknowledge blocked Alarms for this group.

Permission to acknowledge Alarms allowed for a user