3692072 - 503 service unavailable error when accessing payroll control center or payslip in employee central

Error "503 Service Unavailable No server is available to handle this request." occurs when attempting to access any ECP application from SuccessFactors Employee Central, like Payroll Control Center, Direct Pay Statement, Mashup, etc.

"Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental." 

• SAP SuccessFactors Employee Central Payroll
• Mashups / Pay Statement / Payroll Control Center

503 service unavailable, payroll control center, payslip error, employee central, system update, SAP_SUPPORT user, payroll configuration, ondemand URL, error message, troubleshooting , KBA , LOD-EC-ECP-SF , Employee Central Payroll functionality part of SF , LOD-EC-ECP-SF-MAS , Employee Data Maintenance via Mashups , PY-XX-PYP , Payroll Control Center , LOD-EC-ECP-SF-PST , EC Payroll Pay Statement , Problem