How to access Customer source portal

Hi,

I am trying to access the customer source portal for Dynamics.  In the past, I used to go to the below link:

https://mbs.microsoft.com/customersource

Apparently it seems this is not working any more.

Any pointers on how I can login to the customer source account for our organization?

I have the credentials for accessing it, I cannot find the link to the webpage.

Thanks