Emails to exchange365/hosted exchange are delayed. Based on information from microsoft this is an outage. Emails will queue and deliver when online however expect delays to any hosted exchange emails.
We're investigating a potential issue with Microsoft 365 services and checking for impact to your organization. Initial reports indicate possible issues accessing the Microsoft Defender and Microsoft Purview portals, as well as issues using Outlook. We'll provide an update within 30 minutes.
2:44 PM EST:
As we rapidly pursue an investigation into the nature of the impact and the source of the issue, we've received reports that users may be receiving a "451 4.3.2 temporary server issue" error message when attempting to access the service portals or use Outlook.