Hello All, I have some troubles with Bandwidth Priorities on ISA Server instaled on Windows 2003.Does somebody have success with this issue on Win2003 ? Now when I turn on Bandwidth Control, ISA server stop provide access to internet for all clients.When disable, everything working.Nothing strange in event log.NIC's are 2xRTL8139C and Intel PRO/1000. As I read http://support.microsoft.com/default.aspx?scid=kb;en-us;331062 "Running ISA Server on Windows Server 2003" it seems this is supported configuration ? Also I have this book "Configuring ISA Server 2000 : Building Firewalls for Windows 2000" and there I read that bandwidth priorities works with QoS component. And in http://support.microsoft.com/default.aspx?scid=kb;en-us;318602 "QoS Changes in Windows Server 2003 and Windows XP" I read : "Effects on QoS Administrators ACS no longer exists on Windows Server 2003. The RSVP service still runs on the host as a conduit between program and traffic-control components. However, no RSVP messages are generated. GQoS programs can mark packets without ACS policy approval. Note that traffic-control programs can mark packets on Windows 2000, Windows XP, and Windows Server 2003. Older programs that use the IP_TOS socket option can mark packets on Microsoft Windows NT 4.0. Administrators must manage these types of programs in their networks appropriately for their network and program requirements." Thanks in advance. Detelin