Status: Resolved

Microsoft has confirmed that its affected infrastructure has returned to a healthy state and is operating as expected. Should you continue to experience any residual delays, Microsoft recommends clearing your local DNS cache to expedite the update.
Official Microsoft Status: https://admin.cloud.microsoft/?#/servicehealth/:/alerts/MO1221364

Status: Resolved The issue affecting "Log in with Microsoft" for New Outlook users in the US Region is now fully resolved. After deploying a fix and monitoring the environment overnight, we have confirmed that the authentication flow has returned to normal levels.

We apologize for the inconvenience and appreciate your patience.

Resolved: The Email Builder issue has been fully resolved, and a fix has been successfully deployed. Users who were previously unable to access the Email Builder can now use it as expected.

The issue affecting Email Sends has been resolved, with a fix deployed. Please note that any emails that were previously stuck will need to be resent manually.

We appreciate your patience while our teams worked to resolve these issues.