Do you want to disable event and alarm or want to know how to acknowledge/clear it?
Acknowledging/Clear an alarm from Event & Alarm >> Alarms may take some time to clear it on dashboard, so please wait for few minutes.
If you Acknowledge an alarm from dashboard directly, it should go away right away (try refreshing browser window once if it still displays).
If you want to disable events then go to Event & Alarms >> Events >> Event management >> Choose the specific event you want to remove from reporting >> Click on "Disable" button >> Choose "Disable DB persistence".
Syamantak Omer | Community moderator | Staff TSE | CWNA | CCNA | RASZA | RICXI | Follow me at https://linkedin.com/in/syamantak-omer-5949b6124