Showing results for 
Search instead for 
Did you mean: 
New Member

Cannot update Azure DevOps work item for "Other Fields"

I have created a very simple flow that triggers when a Azure DevOps work item is modified. The Action is intended to update the same work item , to add in a Custom field Custom_A a computing a value from three different other fields: Custom_B x Custom_C x Custom_D. 


To update "Other Fields" there is a Key and a value to define:

Key = dynamic value : set to field Custom_A

Value= Expression: mul(triggerBody()?['Fields']?['CustomB'], mul(triggerBody()?['Fields']?['Custom_C'],triggerBody()?['Fields']?['Custom_D']))


It does not work. I get back messages :

- Field Custom_A is not a field in process...

or  "10" (with 10 = value of  field Custom_A) is not a valid field


Am I using the "Other Fields"  wrongly or is it not working properly? 


So frustrating. None of what's written matches what I am experiencing.

If I select a work item type, only 1-2 custom fields are being shown. 

Regardless, the "Other fields" field is a single textbox. Not one that maps key to value.

It doesn't make any sense and I can't get it to work. This should be such a simple action.😫

@lelandholmquest I had to call out that the field was custom in the JSON:



Hope that helps!

Helpful resources

Community Conference

Power Platform Community Conference

Check out the on demand sessions that are available now!

Power Platform ISV Studio

Power Platform ISV Studio

ISV Studio is designed to become the go-to Power Platform destination for ISV’s to monitor & manage published applications.

Top Solution Authors
Users online (12,938)