outlook inbound email issues?

I have a client who is receiving 50% of their mail on outlook servers for the past few hours.

MX records point to:
xxxxx-com.mail.protection.outlook.com has address
xxxxx-com.mail.protection.outlook.com has address

Anyone aware of outlook issues or have someone they can poke to check into this? (Both answer smtp requests, guessing a queue is backed up somewhere.)


Outlook is a client. Microsoft e-mail servers run Sex-Change and the outlook.com domain refers to the servers, not the clients. The Outlook client can "connect" to just about any server ever written but has nothing to do with Microsoft Sex-Change servers.