Unable to start execution of step 1 (reason: JobOwner domain\domainuser

On a server running SQL 2014 SSIS with SSISDB configured, one of the SQL Agent jobs configured to run using a proxy account kept failing with the error below.

doesn‘t have permissions to use proxy 1 for subsystem SSIS). The step failed.

Solution that worked for me in my situation.

Query your proxys and see if that proxy is disabled. If so, enable it.

SELECT * FROM msdb.dbo.sysproxies

USE msdb ;

EXEC dbo.sp_update_proxy

@proxy_name = ‘MyProxyUSerUser’,

@enabled = 1;