External user added in teams
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About the rule
Rule Type
Standard
Rule Description
Detects instances where an external user account is added in teams.
Severity
Attention
Rule Requirement
Criteria
Action1:
actionname = "DETECTION_ACTION_M365_TEAMS_MEMBER_ADDED" AND (MEMBERSID contains "#EXT#")
select Action1.CALLER,Action1.RESOURCE,Action1.MEMBERSID,Action1.OPERATION
Detection
Execution Mode
realtime
Log Sources
Microsoft 365
