Description:

Microsoft 365 is currently deferring email messages

Customers may receive "451 4.3.2 temporary server issue" deferrals when routing emails to Microsoft 365 tenants.

Microsoft has acknowledged a service degradation at https://status.cloud.microsoft/

Updates

2026-JAN-23 20:30 UTC
Almost all data has been restored to the TAP Dashboard at this time. All real time scanning and services remain fully operational.

Proofpoint cross-functional teams will continue to monitor. No further updates are scheduled at this time.

 

2026-JAN-23 19:00 UTC
A large part of our data backlog has cleared. Proofpoint cross-functional teams are continuing to work on ensuring replication is pushing this data directly into the TAP Dashboard. All real time scanning and services remain fully operational.

2026-JAN-23 17:30 UTC
Customers may continue to see a delay in TAP Dashboard data. Proofpoint expects this will be able to be completed within 2-3 hours. All real time scanning and services remain fully operational. 

 

2026-JAN-23 14:30 UTC
Customers may continue to see a several hour backlog in TAP Dashboard data. All real time scanning and services remain fully operational. 

 

2026-JAN-23 12:30 UTC
A degree of lag remains for certain TAP related services, as a result some customers may encounter a delay in events being displayed in the TAP Dashboard, however all real time scanning and services remain fully operational. Proofpoint cross-functional teams are working on reducing the lag as quickly as possible.

 

2026-JAN-23 10:30 UTC
Proofpoint services continue to function in real time. A degree of lag with data ingestion still exists and some customers may see a delay in TAP Dashboard entries. Proofpoint cross-functional teams continue to monitor until all services and functionality is deemed fully recovered.

 

2026-JAN-23 8:30 UTC
Microsoft have reported they are recovered. Proofpoint service delays have now cleared and services are now functioning in real time. Proofpoint cross-functional teams continue to monitor until all services are deemed recovered.

 

2026-JAN-23 6:30 UTC
Microsoft are progressing restoration of services and Proofpoint cross-functional teams continue to closely monitor services. Customer-facing services like TAP Dashboard, Threat Response and TAP SIEM remain operational, and live data is currently being processed without delay. Customer data is still being caught up and this process is expected to take several hours.

 

2026-JAN-23 4:30 UTC
Proofpoint cross-functional teams continue to closely monitor Proofpoint services. 

 

2026-JAN-23 3:00 UTC
Proofpoint cross-functional teams continue to closely monitor Proofpoint services.

 

2026-JAN-23 1:30 UTC
Proofpoint cross-functional teams continue to closely monitor Proofpoint services. 

2026-JAN-22 23:40 UTC
  Proofpoint cross-functional teams have worked to increase capacity for backend services, which has allowed for recovery of customer facing services like TAP Dashboard, Threat Response and TAP SIEM API. There will be a short catch-up period for customer data and Proofpoint teams anticipates this data will be caught up by 01:30 UTC.

2026-JAN-22 22:50 UTC
Impacted product list and impact has been updated.


2026-JAN-22 22:30 UTC
Proofpoint cross-functional teams continue to closely monitor Proofpoint services.
   

2026-JAN-22 20:50 UTC
Proofpoint cross-functional teams remain on standby. Proofpoint is closely monitoring services.

Start time: 22-JAN-2026 20:17 UTC