I have been seeing the message:

'We're updating your inbox

Please wait a few minutes and then try again.

 for 48 hours on my hotmail/outlook account now. It started when I created an allias account ***@outlook.com to add to my existing ***@hotmail.com account. I have tried deleting the allias account to see if that would help but it hasn't. 

How do I fix this? Please help me asap.

Thank you.