This looks so easy but I am not able to achieve.
I want a unique ID for each item in a list in format C_0000 (the id can go up to C_9999) . I thought of using calculated field with ID with formula =CONCATENATE("C_";TEXT(ID;"0000")) . It works fine till I use the default NewForm.aspx. As soon as I customize the item form with Nintex, the calculated field always results in C_0000. It is not able to get the ID value.
So not sure how to troubleshoot this issue.
Any other ideas??