I have a customer who had a controller fail and instead of replacing it they want to move the users to another system in the cluster. We will call the failed system B and the good system A for this. Phones with B as their primary are currently failed over to A and operational. What is the best way to remove them from A as resilient and add them back to A as primary? The systems are a mix or rel 9.0 and MCD 4.0 with OPS/EMan still in use. I don't have a way to test anything out as they only want consultaion and not hands on.
My first thought was remove them from the tel dir in OPS and propogate the changes down, then re add the users. Would this work since controller B no longer exists?