There was not much message to the error. Here it is:

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

If I should look at some other places for messages, please let me know...

This proxy account (SDRGE\svcBOKPosPay) is sysadmin on SQL Server database level. It also belongs to administrators group on the server level. So I don't know what else it might need...

The process is setup basically the same. Same SSIS package, same procedure to create all the steps, etc. The proxy account actually has less privilege on the other server that succeeds as it is not a admistrator group member on the server.

I am completely lost... Only thing I can say is that the setup somwhere along the way is different between the two servers, but I cannot figure out where and what...