1. Log into CA Service Desk Manager using a user with Administrator rights. From the Administration tab go to the "Service Desk" section, expand it, and select "Service Types"
2. Open "Priority 1 Resolution"
3. From here, open the "Priority 1 resolution status" and "priority 1 resolution alert" Events. These events are designed to trigger every 15 minutes and 30 minutes, respectively. You may either edit the Events to increase the delay timer (which will delay how often the notifications are triggered) or disable them completely.
If the event is currently associated to a ticket in CA Service Desk Manager it may still continue to trigger, but any new cases will receive the updates performed.