You could possibly find all set-mailbox actions by using the below powershell command
Search-UnifiedAuditLog -Operations Set-Mailbox -StartDate 01-Jul-2023 -EndDate 09-Jul-2023 -Formatted -ResultSize 1000 | ft creationdate, userids, operations
or visit Microsoft Purview (
https://compliance.microsoft.com/) a do a search under Audit.