Could you please let me know when do I need acrobat professional for adobe interactive forms? can this be replaced with adobe reader with reader rights?
could someone please help me?
please see also my answer to your other question. In general you do not need Adobe Acrobat to use SAP Interactive Forms by Adobe. The free Adobe Reader is sufficient.
Please keep in mind that SAP only supports using the LiveCycle Designer integrated in an SAP Development Environment (NetWeaver Developer Studio or ABAP Workbench) and not standalone. Therefore forms are always generated on the server and include Reader Rights.
If you want to use the LiveCycle Designer standalone outside of SAP you should buy it. It is part of Acrobat Professional.