We are trying to read data from OPC server hosted on separate server but in the same network, we're facing issue access denied issue (details below), The QuickOpc doesn't provide a way to pass username/password of the server (before we used Java-based library which allows that) we found some posts in QuickOPC online forums which mention that any credentials or access should be set and configured from outside the program.

Can you help me to find out what exactly should be configure outside the program and whether specific account needs to be created/configured on the client machine?

Error :
Error :An OPC operation failure with error code -2147024891 (0x80070005) occurred, originating from 'OpcLabs.EasyOpcRaw.DataAccess.RawEasyDAClient' and with depth of 1. The inner exception contains details about the problem.

Code snippet:
EasyDAClient Client = new EasyDAClient();
EasyDAClient.SharedParameters.ClientParameters.UseCustomSecurity = false;
EasyDAClient.SharedParameters.ClientParameters.TurnOffActivationSecurity = true;
EasyDAClient.SharedParameters.ClientParameters.TurnOffCallSecurity = true;

//no paramters for passing the credentials, only hostname and progid
var resp = Client.ReadItem(new ServerDescriptor(myConfig["HOSTNAME"], myConfig["PROGID"]), new DAItemDescriptor(a));