Thanks for your reply. I am not very tehnical but I have seen a similar request and your colleague Adrian provided a solution here: https://www.oxygenxml.com/forum/topic11030.html#p31805 - I tried the solution in my case but it didn't applied the copy/paste, unless I am doing something wrong? Below ...

Hi, I am trying to find a way where the value inside <contactphone>value</contactphone> to be copied to <custom name="cs_phone">paste here</custom> Doing manual work seems to be taking several hours for me (thousand records). Is there a way I can automate this? Any help is much appreciated...