• I've created a Credential Cred1 (DOMAIN\USER1 with the secret = domain password)
  • I've created a SQL Agent job with owner to NT AUTHORITY\SYSTEM
  • The job needs to proxy as credential Cred1

So when I run the job it fails with the message that NT AUTHORITY\SYSTEM wasn't allowed to proxy 1 (I only have one credential) for CmdExec.

"Unable to start the execution of step1 (reason: JobOwner NT AUTHORITY\SYStem doesn't have permissions to use proxy 1"

I've done a bit of google search for the permissions needed, and I read that I need to give operator access to the NT AUTHORITY\SYSTEM login in the MSDB. I've tried this but still no luck.

2 Answers 2


Expand SQL Agent
Expand Proxies
Find your proxy, right-click on it and choose Properties
Go to the Principals tab

This will give that account permission to use the proxy.

  • Thank you! I had to delete the existing proxy and recreate it as it was suffering a Object Null Reference Exception in the UI until then. When I tried to script this - also get a UI exception. BUt I've achieved what I need. Thank you again. Jul 10, 2012 at 4:28

Check select * from msdb.dbo.sysproxies if your proxy is enabled, we had a similar problem and we recreated the proxy with enabled = 1.

That seem to have solved the problem with this error.


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