It's a standard Open Source install, I upgraded to version 3 yesterday without any probIems. A http login defaults to https admin login (
https://192.x.x.x:7071/zimbraAdmin/?initMode=http), except in internet explorer where it will login to user.
How do I set the tls mode? Okay this is done in browser settings and it makes no difference. I don't understand how it can work perfectly in one browser but not in another