Email delivery delays - Microsoft is working on the problem

All emails are now delivered without delays. We're monitoring the services actively.

Details of the incident may be found in SI# EX225938 on the Microsoft 365 Admin Dashboard and on Twitter: https://twitter.com/MSFT365Status/status/1324444676993277957.

Emails are now delivered without delays in UK South and West US geolocation. A small number of emails sent by a subset of users in North Central US geolocation may still be delivered with delays. Details of the incident may be found in SI# EX225938 on the Microsoft 365 Admin Dashboard and on Twitter: https://twitter.com/MSFT365Status/status/1324444676993277957. Email signatures are added normally.

The performance of affected Microsoft Exchange Online Protection servers in UK South geolocation is now improving, we're not seeing any email delivery delays. A small number of emails sent by a subset of users in North Central US and West US geolocations may still be delivered with delays. Details of the incident may be found in SI# EX225938 on the Microsoft 365 Admin Dashboard and on Twitter: https://twitter.com/MSFT365Status/status/1324444676993277957. Email signatures are added normally.

Microsoft engineers have applied a fix to mitigate impact. Details of the incident may be found in SI# EX225938 on the Microsoft 365 Admin Dashboard and on Twitter: https://twitter.com/MSFT365Status/status/1324444676993277957. Email signatures are added normally.

A small percentage of emails sent by a subset of users may experience delays in email delivery due to degraded performance of Microsoft Exchange Online Protection. Details of the incident may be found in SI# EX225938 on the Microsoft 365 Admin Dashboard and on Twitter: https://twitter.com/MSFT365Status/status/1324444676993277957. Email signatures are added normally.