If you have been administering CRM Online organizations, you may find that your cheese has been moved. Normally, you would click the Office 365 app selector from the Office 365 Admin console, and then select Dynamics CRM to get to the list of organizations.
Now you will find that replaced with the snazzy new Dynamics 365 logo, and when you click that button, you will now see a grid of Dynamics 365 apps, which includes all of your organizations.
The problem is, there is no obvious way to get from here to the screen where you can copy, back up, or reset the organization.
To directly navigate to the traditional instance picker screen (at least in North America), go to the following URL: https://port.crm.dynamics.com/G/Instances/InstancePicker.aspx?Redirect=True
This will take you to the instance picker that we all know and love.
Thanks Scott Jung for the tip!