how long does Azure AD store events in the sign-in logs?

 https://learn.microsoft.com/en-us/azure/active-directory/reports-monitoring/reference-reports-data-retention#how-long-does-azure-ad-store-the-data

Activity reports

Report	Azure AD Free	Azure AD Premium P1	Azure AD Premium P2
Audit logs	Seven days	30 days	30 days
Sign-ins	Seven days	30 days	30 days
Azure AD MFA usage	30 days	30 days	30 days

You can retain the audit and sign-in activity data for longer than the default retention period outlined above by routing it to an Azure storage account using Azure Monitor. For more information, see Archive Azure AD logs to an Azure storage account.

Security signals

Report	Azure AD Free	Azure AD Premium P1	Azure AD Premium P2
Risky users	No limit	No limit	No limit
Risky sign-ins	7 days	30 days	90 days