Hello KiwiJJ,
Welcome back to the Centrify Community! The issue you are describing with running the adbindproxy script can manifest itself if a group policy is turned on in your environment.
That Group Policy is located out at:
Computer Configuration -> Policies -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> Network access: Named pipes that can be accessed anonymously"
There also is a newer script that will actually let you enter a different admin user and password and it will then get passed the domainsid error, even if the GP is enabled.
Here is a KB that discusses both of those options.
Cody C.