Real time service check failed

We can check the health of the real time service by using the url

https://[RetailServerHostName]/healthcheck?testname=ping

It would give a result like below

Recently we were getting issue with real time service 

Error log

System.ServiceModel.FaultException: Forbidden Server stack trace: at System.ServiceModel.Channels.ServiceChannel.HandleReply(ProxyOperationRuntime operation, ProxyRpc& rpc) at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout) at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation) (RunHealthCheckRealtimeRequest request) at Microsoft.Dynamics.Commerce.Runtime.Services.HealthCheckTransactionService.Execute(Request 

This was because the retailserviceaccount user was disabled. The retail service account is used by retail services to access Dynamics 365 Finance and operations.

Please run the below script to enable the user and resume the real time services.

update userinfo 
set enable =1
where id = 'RetailServiceAccount'