I've created a formula field like the following, and created a dynamic rule to set the formula field value to the original value, on form save (after checking).
This sets only the same value again to original on saving the form for the first time since record ID is empty. When I edit and save second time, the record ID is appended. I'm trying to find a way to get the last used Record ID so that I can increment 1 and append it to original value.
If this is not possible, can someone please suggest a way to generate a unique number using Record ID on saving the form on first time?