Hi All, I have been using RPC over HTTP for some time and now since Monday morn have been unable to connect while in comming through ISA. I can connect when I'm local or over VPN though so Exhcange is set right. My ISA logs show the connection established and then terminated with error code 0x80074e21 showing the connection was abortively closed after RST segment. None of the certifiates have changed. From the net when I try to connect via IE to https://server.domain.com/rpc I get the login prompt but rahter than the expected 403.2 Forbidden, I get 401.3 Access denied due to an ACL on the resource. I have restarted the server as well. Any suggestions are welcome. Thanks TD