Identity Manager

Error while running AD initial synchronization via a remote job server connected to App server

Hi,
we are getting error while running AD initial synchronization via a remote job server connected to an application server.
the error in App server logs says an authorization issue-
2018-02-13 05:13:32.0334 ERROR (ObjectLog ) : [810284] Failed to authenticate user.
[810286] You do not have permission to use this authentication module.
System.AggregateException: One or more errors occurred. ---> VI.Base.ViException: Failed to authenticate user. ---> VI.Base.ViException: You do not have permission to use this authentication module.
at VI.DB.Auth.AuthModStackBased.CheckAccess(IAuthProps props, Func`2 predicate)
at VI.JobService.JobComponents.DbJobComponent.ComponentAuthenticator.AuthenticateAsync(IDbSession dbSession, IResolve services, IAuthProps props, CancellationToken cancellationToken)
at VI.DB.Auth.DbAuthenticator.<AuthenticateAsync>d__10.MoveNext()
--- End of inner exception stack trace ---
at VI.DB.Auth.DbAuthenticator.<AuthenticateAsync>d__10.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at VI.DB.Entities.SessionFactoryImpl.<>c__DisplayClass16_0.<<OpenAsync>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at VI.DB.Entities.SessionFactoryImpl.<_OpenAsync>d__19.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at VI.DB.Entities.SessionFactoryImpl.<OpenAsync>d__16.MoveNext()
--- End of inner exception