The cmdlets `Search-MailboxAuditLog` and `New-MailboxAuditLogSearch` in Microsoft Exchange Online will retire in March 2025. Admins can access and modify records until late June 2025, after which they become static. Users should be notified, documentation updated, and auditing enabled to use `Search-UnifiedAuditLog`.
Applies to: Exchange Online
Source: mc.merill.net — data via Merill Fernando's open archive (MIT).