If you have two services under your account, you can move a single domain from one service to another without any downtime for your end-users.
To move your domain,
www.example.com from Service A to Service B
- Add a wildcard domain to Service B, i.e.
www.example.comfrom Service A. The wildcard domain in Service B will capture any requests for
www.example.comto Service B
- Remove the wildcard domain