Sip Gateway registration

[DwightShrute]

I have a Cisco 7841 with MPP firmware that I am trying to sign into. I have followed the docs and managed to sign into the Sip gateway, the phone appears in the Admin portal for our tenancy. The phone displays a sign in page, I press sign in, and I get a code to use when I sign in via a browser.

I go to browser and put in code, it then asks me for my username and password, which all goes through okay. but the phone just stays on the sign in screen, nothing happens. It has been a week. I have reset phone. I got to device page on the admin portal and it shows below. 

[#2]

@DwightShrute 

Since the community has not yet responded to your post, you might want to seek assistance with other resources that are focused on tech support:

• Ask your IT manager to open a support case or call Microsoft using the support line you were given.  Other options for business subscription admins are listed here:

Get support | Microsoft Docs

https://support.serviceshub.microsoft.com/supportforbusiness/create

• Additional tech support is available at support.microsoft.com or Answers.microsoft.com, where authorized Microsoft agents are available to trouble an issue until it’s resolved.