Users may be seeing degraded service functionality or be unable to access multiple Microsoft 365 services

A possible issue affecting Microsoft 365 services has been detected. Symptoms include:   Sending and receiving email through Exchange Online, including notification emails from Microsoft Viva Engage. Users may be receiving a "451 4.3.2 temporary server issue" error message when attempting to send or receive email through Outlook.Accessing the service portals, including Microsoft Purview, Microsoft Defender XDR, and the Microsoft 365 admin center.
Current status: Microsoft has identified a portion of dependent service infrastructure in the North America region that is not processing traffic as expected. This is impacting their load balancing processes and general service availability. They are working to restore this infrastructure to a heathy state and rebalance the service traffic to achieve recovery.Scope of impact: Any users served through an affected section of service infrastructure in the North America region may be intermittently impacted.
Next update by: Thursday, January 22, 2026, at 10:00 PM UTC Thank you for your patience. Our apologies for any inconvenience caused.
Best regards,
The Sherweb Technical Support Team

User impact: Users may be seeing degraded service functionality or be unable to access multiple Microsoft 365 services.



More info: Users may be receiving a "451 4.3.2 temporary server issue" error message when attempting to send or receive email through Outlook.
 
Some of the impacted service functions include, but may not be limited to:
- Sending and receiving email through Exchange Online, including notification emails from Microsoft Viva Engage.
- Collecting message traces.
- Searching within SharePoint Online and/or Microsoft OneDrive.
- Accessing the service portals, including Microsoft Purview, Microsoft Defender XDR, and the Microsoft 365 admin center.
- Creating chats, meetings, teams, channels or adding members in Microsoft Teams.
- Receiving presence or location information in Microsoft Teams.
- Applying and managing sensitivity labels, interactive operations on reports, and artifacts with sensitivity labels in Microsoft Fabric.
 
Current status: Microsoft restored the affected infrastructure to a heathy state, further load balancing is required to mitigate persistent impact. Microsoft identified and are implementing additional actions to direct requests and traffic to additional healthy sections of infrastructure to achieve withstanding recovery.
 
Scope of impact: Any users served through an affected section of service infrastructure in the North America region may be intermittently impacted.
 Next update by: Thursday, January 22, 2026, at 6:00 PM ET

More info: Some of the impacted service functions include, but may not be limited to:- Sending and receiving email through Exchange Online, including notification email from Microsoft Viva Engage as well as subscription email for Microsoft Fabric users. Users may be receiving a "451 4.3.2 temporary server issue" error message when attempting to send or receive email through Outlook.- Collecting message traces.- Searching within SharePoint Online and/or Microsoft OneDrive.- Accessing the service portals, including Microsoft Purview, Microsoft Defender XDR, and the Microsoft 365 admin center.- Creating chats, meetings, teams, channels or adding members in Microsoft Teams. Additionally, some users may be unable to create breakout rooms- Receiving presence or location information in Microsoft Teams.- Existing or new meeting options for Facilitator in Teams may not be honored.- Applying and managing sensitivity labels, interactive operations on reports, and artifacts with sensitivity labels in Microsoft Fabric. Current status: Microsoft carefully rebalancing traffic across all affected infrastructure in the region, Microsoft monitoring the corresponding health telemetry, to ensure the environment enters into a balanced state as our remediation efforts continue. Microsoft proceeding as quickly as possible and this incremental approach will also help us identify whether any additional actions may be required to ensure longstanding recovery. Scope of impact: Any users served through an affected section of service infrastructure in the North America region may be intermittently impacted.Next update by: Thursday, January 22, 2026, 7:00 PM ET

User impact: Users may be seeing degraded service functionality or be unable to access multiple Microsoft 365 services.



More info: Some of the impacted service functions include, but may not be limited to:
- Sending and receiving email through Exchange Online, including notification email from Microsoft Viva Engage as well as subscription email for Microsoft Fabric users. Users may be receiving a "451 4.3.2 temporary server issue" error message when attempting to send or receive email through Outlook.
- Collecting message traces in Exchange Online.
- Searching within SharePoint Online, Microsoft OneDrive, and/or Microsoft Teams.
- Accessing the service portals, including Microsoft Purview, Microsoft Defender XDR, and the Microsoft 365 admin center.
- Creating chats, meetings, teams, channels or adding members in Microsoft Teams. Additionally, some users may be intermittently unable to create breakout rooms or Microsoft Teams live events.
- Receiving presence or location information in Microsoft Teams.
- Existing or new meeting options for Facilitator in Teams may not be honored.
- Applying and managing sensitivity labels, interactive operations on reports, and artifacts with sensitivity labels in Microsoft Fabric.
- Print registration and printer jobs may fail in Universal Print.
 
Current status: During Microsoft's ongoing efforts to rebalance traffic across the region, they introduced a targeted load balancing configuration change intended to expedite the recovery process, which incidentally introduced additional traffic imbalances associated with persistent impact for a portion of the affected infrastructure. Microsoft is remedying their load balancing configurations while, in parallel, reviewing the viability of expediting our ongoing incremental rebalancing and recovery efforts.
 
Scope of impact: Any users served through an affected section of service infrastructure in the North America region may be intermittently impacted.

Next update by: Thursday, January 22, 2026, 8:00 PM ET

User impact: Users may be seeing degraded service functionality or be unable to access multiple Microsoft 365 services.More info: Some of the impacted service functions include, but may not be limited to:- Sending and receiving email through Exchange Online, including notification email from Microsoft Viva Engage as well as subscription email for Microsoft Fabric users. Users may be receiving a "451 4.3.2 temporary server issue" error message when attempting to send or receive email through Outlook.- Collecting message traces in Exchange Online.- Searching within SharePoint Online, Microsoft OneDrive, and/or Microsoft Teams.- Accessing the service portals, including Microsoft Purview, Microsoft Defender XDR, and the Microsoft 365 admin center.- Creating chats, meetings, teams, channels or adding members in Microsoft Teams. Additionally, some users may be intermittently unable to create breakout rooms or Microsoft Teams live events.- Receiving presence or location information in Microsoft Teams.- Existing or new meeting options for Facilitator in Teams may not be honored.- Applying and managing sensitivity labels, interactive operations on reports, and artifacts with sensitivity labels in Microsoft Fabric.- Print registration and printer jobs may fail in Universal Print. Current status: Microsoft is continuing to refine their load balancing configurations to remedy residual imbalances across the environment and further their ongoing recovery efforts. Scope of impact: Any users served through an affected section of service infrastructure in the North America region may be intermittently impacted.Next update by: Thursday, January 22, 2026, 9:00 PM ET

User impact: Users may be seeing degraded service functionality or be unable to access multiple Microsoft 365 services.More info: Some of the impacted service functions include, but may not be limited to:- Sending and receiving email through Exchange Online, including notification email from Microsoft Viva Engage as well as subscription email for Microsoft Fabric users. Users may be receiving a "451 4.3.2 temporary server issue" error message when attempting to send or receive email through Outlook.- Collecting message traces in Exchange Online.- Searching within SharePoint Online, Microsoft OneDrive, and/or Microsoft Teams.- Accessing the service portals, including Microsoft Purview, Microsoft Defender XDR, and the Microsoft 365 admin center.- Creating chats, meetings, teams, channels or adding members in Microsoft Teams. Additionally, some users may be intermittently unable to create breakout rooms or Microsoft Teams live events.- Receiving presence or location information in Microsoft Teams.- Existing or new meeting options for Facilitator in Teams may not be honored.- Applying and managing sensitivity labels, interactive operations on reports, and artifacts with sensitivity labels in Microsoft Fabric.- Print registration and printer jobs may fail in Universal Print.Current status: Microsoft is continuing to refine their load balancing configurations to remedy residual imbalances across the environment and further their ongoing recovery efforts.Scope of impact: Any users served through an affected section of service infrastructure in the North America region may be intermittently impacted.You can follow Microsoft's status here: Microsoft service health statusNext update by: Thursday, January 22, 2026, 6:30 AM ET