Acumatica has a feature to create Attributes, Attributes can be used for both Screen UDF and as Attributes within an entity; ( like Customer Attributes, Item Attribute, Project Attributes).
There is a limitation that an Attribute with a Selector type ( ie Sales person ), is not available to the Attributes within an entity either using Customer Class, Project Attributes). I do not agree with this limitation. ( See Acumatica Case 404426) .
So, the choice is to create a Combo Box Attribute, that is available to the entity attributes; however the client needs to maintain two screens for the same concept ( sales person profile and sales person combo box attribute). or have to spend customization dollars to synch this up. The goal is to use more no code.
Alternate 2 - is to create the Selector Attribute, assign it as a Screen UDF; but screen UDF do not copy from Project Quote to Project), again I will need to use a customization project to accomplish. (no code vs code).
A simple solution is to allow Selector Attributes to be used for entity Attributes so we can minimize the duplicate entry. Side Note ( I believe that Project Quotes and Projects should have Sales Persons?)
