Typically, you would assign
Security Admin or Security Operator at a minimum:
https://learn.microsoft.com/en-us/azure/active-directory/roles/permissions-reference#security-administrator
Security Alerts
Orr, Tony
1
Reputation point
What permissions you need to close security alerts?
2 answers
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Andy David - MVP 141.5K Reputation points MVP
2022-08-15T16:39:23.643+00:00 -
M A Ali 1 Reputation point
2022-11-06T16:31:50.863+00:00 on defender you can close it with contributor permissions