Web config transform on microsoft.identityModel - 'http://schemas.microsoft.com/XML-Document-Transform' attribute is not declared

Question

I have got a Web.Release.config that is successfully transforming a connection string.

When I add a microsoft.identityModel section I get a warning saying

Answer 1

I've run into this also but have gotten it to work. What I did was a "RemoveAll" and an "Insert" instead of a replace/match:

When I do it that way I get the desired transform and output config file.