So, we have a situation where we have a new domain and user name convention that we will need to start using in our farm.
The tricky bit is that we will continue to need old domain users / user profiles for some legacy apps for the foreseeable future. So I don't believe that I can use move-spuser.
I want our existing mysites (in old domain and user name convention) to have different URLs (reflecting the new naming convention) and to be associated with the new user domain user.
I also want to (if possible) copy profile information from old domain\user1 to newdomain\user1.
We are making new web apps / site collections that I will restrict to use newdomain only in the people picker, so permissions won't be an issue.
Any ideas on how to accomplish this?