SQL SSIS proxy Error

Hi All,

I have job under sql agent for running an SSIS package which is using proxy account  and Failing with reason below

Unable to start execution of step 1 (reason: Error authenticating proxy EM\app_proxyacc, system error: Logon failure: unknown user name or bad password.).  The step failed.

Sql version is:  2008 R2

What permission are required for the proxy credentials?

Thanks,

Nani.

Thanks, Nani.