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Report in AAD sign in logs the last time an Azure AD guest account was used
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| // https://blog.alexmags.com/tags/kql/ | |
| let last_sign_in_by_account = | |
| SigninLogs | |
| | where TimeGenerated > now(-90d) | |
| | where ResultType == 0 | |
| // filtering out local accounts to identify guest accounts. I couldn't identify account type in log data. Maybe TimeGenerated.HomeTenantId?? | |
| | where UserPrincipalName !endswith "companyname.com" and UserPrincipalName !endswith "AlsoCompanyname.com" and UserPrincipalName !endswith "tenantname.onmicrosoft.com" and UserPrincipalName !endswith "YetAnotherVerifiedDomain.com" and UserPrincipalName !endswith "SeriouslyICouldntIdentifyAccountTypeInLogData.com" | |
| // get last login per account | |
| | summarize argmax(TimeGenerated, *) by UserPrincipalName; | |
| last_sign_in_by_account | |
| | project max_TimeGenerated, domain=split(UserPrincipalName,'@')[1], UserPrincipalName, max_TimeGenerated_AppDisplayName, max_TimeGenerated_AuthenticationRequirement, max_TimeGenerated_ClientAppUsed, max_TimeGenerated_UserDisplayName | |
| | order by max_TimeGenerated desc |
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