Storage Migration Service - Cutover Fails/hangs During Rename and Reboot Source Server Step

DrKuhlmanI came across this exact issue and I was able to determine what caused it in my scenario. I pulled up the debug on the proxy in the events section and found an error that said the said source server was not reachable at the new hostname it applied. When I attempted to ping it, it could not resolve the address. I found that DNS record had not been created for the new hostname. I also found that the original entry was a static entry. Once I added the A record in my local DNS for the new name of the source server, it was able to get past this upon next attempted cutover. Hope this helps!