...this is for Nintex On Premise.

Hi @NotSure ,

What you are trying to do with choice controls is not possible out of the box.
You would need to use cascading lookups to achieve this solution.

@SimonMuntz thank you, any resources you suggest I read/watch to get myself up to speed?

@SimonMuntz sub note, the Nintex Form provides the necessary inputs to start a document automation workflow using Word quickparts. The columns in the related SharePoint list and their equivalent in the Document Library are Choice columns.

Is converting the Choice columns to Lookup in both the SharePoint List and Document Library going to break anything in the use of Word Quickparts?

Hi @NotSure,

Here is instructions on how to do cascading lookups.
 

As quickparts are a Microsoft feature I am unable to advise on this functionality.

@SimonMuntz thank you