We're switching Marketo instance wherein landing pages domains will also change. Our current domains is abc.branddomain.com and we will be switching to xyz.branddomain.com.
To complete the switch for landing pages here are the steps we followed and these are validated by Marketo support as well.
1. Set up domain alias for abc.branddomain.com in the new Marketo instance, as outlined in the second half of the below document
2. Set up redirect rules for the old landing page URLs to the new landing pages
3. Complete the CNAME change to point abc.branddomain.com -> newinstance.mktoweb.com and delete the existing DNS entry for abc.branddomain.com from old instance
Even after completing all these steps the URLs from old instance are still opening with same URL and not redirecting to the new URLs. Is there something that we might be missing here?