From Microsoft: Users may experience errors or failures when accessing their mailbox via any Exchange Online connection methods.

This includes but is not limited Outlook Classic, Outlook (New), Outlook on the Web, Outlook Mobile. More updates to follow as frequently provided by Microsoft.

From Microsoft: We’re developing a change to help recover the impacted service environment.

This includes but is not limited Outlook Classic, Outlook (New), Outlook on the Web, Outlook Mobile. More updates to follow as frequently provided by Microsoft.

From Microsoft: We’re continuing to see improvements in the infrastructure where our database optimizations and configuration changes have been applied; however, the impact has not been fully resolved.

This includes but is not limited Outlook Classic, Outlook (New), Outlook on the Web, Outlook Mobile. More updates to follow as frequently provided by Microsoft.

From Microsoft: The service health across different connection methods remains stable and healthy. We’re continuing to roll out a build update across the remaining affected infrastructure and it is progressing as expected.

This includes but is not limited Outlook Classic, Outlook (New), Outlook on the Web, Outlook Mobile. More updates to follow as frequently provided by Microsoft.

From Microsoft: We're continuing to monitor the service and taking proactive measures to ensure service stability through the peak traffic time in the Americas region.

This includes but is not limited Outlook Classic, Outlook (New), Outlook on the Web, Outlook Mobile. More updates to follow as frequently provided by Microsoft.

From Microsoft: The service has remained healthy as we’re actively monitoring and implementing proactive measures to maintain stability during peak traffic hours in the Americas region. In parallel, we’re working to accelerate the updated deployment, intended to ensure full resolution, to affected infrastructure. We do not have an ETA for completion at this time.

This includes but is not limited Outlook Classic, Outlook (New), Outlook on the Web, Outlook Mobile. More updates to follow as frequently provided by Microsoft.

From Microsoft: We’ve confirmed that service health remains stable across all connection methods, and the build deployment is progressing successfully across the remaining infrastructure.

This includes but is not limited Outlook Classic, Outlook (New), Outlook on the Web, Outlook Mobile. More updates to follow as frequently provided by Microsoft.

From Microsoft: We've now resolved the incident. Thanks for your patience.