As mentioned in MC708335, beginning in April 2024, Intune audit logs will only be retained for up to one year to align with the documented retention period.
[How this will affect your organization:]
If you would like to retain audit logs older than one year, export the logs before this change by navigating to the Intune admin center > Tenant administration > Audit logs, use the Filter option to select a date range and then select Export. For more details, read Use audit logs to track and monitor events in Microsoft Intune.
[What you need to do to prepare:]
Notify your IT admins and update your documentation guidelines as needed.