The existing documentation also doesn't give a lot of info other than custom_fields = { example : "example" } for proper definition of them.
From ADO, custom fields, when created, could contain the following properties: is it from existing field or a new one, name, description, type, required with default value, and layout with multiple properties.
Community Note
Description
Custom fields in work items are of specific shape which as far I can see and read through the code is not implemented: https://github.com/microsoft/terraform-provider-azuredevops/pull/659/files#diff-d52cafbb405887e133170ccdec83c29154d37e34ac7b4e47e95b1942e93f3779.
The existing documentation also doesn't give a lot of info other than
custom_fields = { example : "example" }
for proper definition of them.From ADO, custom fields, when created, could contain the following properties: is it from existing field or a new one, name, description, type, required with default value, and layout with multiple properties.
New or Affected Resource(s)
azuredevops_workitem
References
https://github.com/microsoft/terraform-provider-azuredevops/pull/659