Speed Up initial RDP connection to Windows Server 2012 R2 Gateway

Hello

I am having many problems of slowness when trying to initialize RemoteApps from RDWeb on Windows Server 2012 R2 Gateway more precisely two minutes.

I performed the following technical procedures:

- Try uncheck Bypass the RD gateway for local addresses (If I checked this option I can open a RemoteApp through the VPN or LAN time in 10 seconds).

-Computer Config > Windows Settings > Administrative Templates > Windows Components > Remote Desktop Services > Remote Desktop Session Host > Connections > Select RDP transport protocol = Use only TCP

- Try RDP security layer and encryption level as low

- Try to close the connection on RDP Default Port 3389 on Windows Firewall and Fortigate Firewall to force Clients to use 443

- Disabling UAC on all servers (oddly enough this seemed to increase the login time

- Disabling client device redirection;

- Set the value name on registry to DisableTaskOffload and the value data to 1

But I'm not getting any positive results.

My RDS System is divided by 3 Servers (if i have all roles into one Server i do not have any slowly issues):

1 Windows Server 2012 R2 with roles/applications:

• RD Gateway;

• RD Broker;

• RD Web Access  ;

• RD Licensing;

• Active Directory;

• DNS Server;

• SQL Instance (default instance for RD Broker);

• IIS;

2 Windows Server 2012 R2 with roles:

• RD Session Host;

• All client aplications;

I need to speed up my initial connection can anyone help me?!

Thank you