Rally: How to Update Planned End Date to null value using API

Products

• CA Agile Central SaaS (Rally)

Issue/Introduction

Is it possible to update an existing date in the Planned End Date attribute to null value using the Rally API? 

Environment

 

 

Resolution

I was successful using this as my URL:

https://us1.rallydev.com/slm/webservice/v2.0/portfolioitem/18888888168?

And this as my payload:

{
  "PortfolioItem": {
    "PlannedEndDate": null
  }
}