550 5.7.705 Tenant Email Block 55+ Hours - Support Unresolved (opens in new tab)

Our M365 tenant (labaradorpake.onmicrosoft.com) has been blocked from sending outbound email for over 55 hours with error 550 5.7.705 Access denied, tenant has exceeded threshold. Despite multiple support tickets and promises of 24-hour resolution, the block remains active. **Error Details:**- NDR: 550 5.7.705 Access denied, tenant has exceeded threshold- Scope: External outbound email only is blocked; internal tenant-to-tenant email works fine- Microsoft Defender Restricted Entities page sho...