Can anyone please tell me how to signup for CustomerSource account in microsoft

Can anyone please tell me how to signup for CustomerSource account in microsoft
Hi partner,
You could refer to this blog.
https://community.dynamics.com/p/logintocs
BTW, what's the dynamics 365 application are you using? This forum is used to ask and resolve questions of customizations in Dynamics 365 Customer Engagement .
Best Regards,
Leo