Hi. I have a big problem with my ISA 2004. POP3, FTP and may be something else works only when in access rule I select "All users". But when I select AD group or user this protocols doesn't work. It seems that ISA don't see user credentials. In ISA logs it doesn't show user info, it just show my rule name with status "Establishe" then "Terminate". There is no errors in event viewer. Please someone help me.
"All users" mean for ISA "allow all connections without check credentials". "All authenticated users" mean only users with username/password accepted by AD can connect by this rule. Try to create new group "Mail users" in AD. Give them permission to use e-mail. Put this group into ISA rule and turn logging on. Try to connect from this group member and see whats going on. Its maybe a couple different errors which prevent your users to go as expected: -ISA maybe not communicate with AD correctly (blocked, not syncronized, etc.), -Other rule maybe overrites this one, -DNS settings maybe wrong and prevent ISA from receiving credentials. See what logging tells you.
I did everything as you said. It just doesn't work. But when I reinstall server and instead of Windows 2003 sp1 install Windows 2000 sp4 everyting works fine whith same configuration. May be something wrong with sp1 for windows 2003.