Hello @Satya D and thank you for your question.
Each of the supported data types map to primitive data types. The unsupported ones are complex collections, which may contain one, or many values. Not all supported sinks support collections.
At this time, the only way I can see pulling the values, is converting the PartyList to a lump of text, and unpack it on the other end.
Can you create a new text-like field on the Dynamics side which pulls the contents of the allparties and concatenates them together?