We are in the process of moving our brand to a new SFMC instance. Our old instance which is running as of now is on stack 10 while the new one that we got is on s11. Does this mean SAP cannot be shared with the new instance?
We plan to move to new instance completely and then go live with it meanwhile disabling the old instance. So what are our options here? I read some answers related to this and understood that the best thing to do would be to get a new domain and do IP Warming and then start using that domain. But in our scenario, we do not have scope for a new domain and IP Warming process.
Can someone share their experience and best practices in this case. Thanks!