Is there a workflow action where I can update a field value and then followed by making it read-only after that?
If you use Nintex Forms you can add a rule on this field and if this field is not empty, just disable it
The result will be that whenever you fill the field once, your field become disabled!
You could add a "parallel" list (PL) linked to your current list/item, and on the PL add the fields you want to "protect" as READ-ONLY, then you could manage the related items on PL by settings permissions on the item.
I hope you have understood my idea
Thank you for your kind suggestion. However, I would like to make the field read-only in the same item not in a different list.
What is rule should be used to disable a field section after it is filled.
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