If you remove the original PI Server and leave only the new one, whenever you open a PDI that points to the previous server it will ask you what server to go and get the tags from, you'll do this for each name ocurring in the file.
Also, I think the thread you were looking for is this one
Thank you very much.
I have seen the ask for new server dialog before (didnt really understand it, but do now) next problem my displays stopped asking for new server? I messed up something. I also did the server alias sucessfully.
Final Solution I used the PB Support tool to rename Server in all displays. What a fantastic tool I really appreciate the "genius" that created that one, saved me from a lynching mob...Thanks again.
Does anyone have such a great tool for changing the server name in the PI Trend object that inserts into excel?