I actually updated that wiki last, about as clear as I can write it anyways -
So
mixed makes sure all logins are https:
-If the user goes to http:// it will redirect to https://
for the login only, then will revert to http:// for normal session traffic.
-If they browse to https:// then they will stay https:// for the entire session.
Beginning with ZCS 5.0 we have
redirect which forces a change to https:
-Like
mixed, if the user goes to http:// it will redirect to https:// but they will
stay https:// for their entire session.
-
Redirect is more useful than setting the mode to
https because otherwise you'll just get nothing on visiting http://
If you want it to be their choice, don't forget
both mode which doesn't do any redirect - just lets you connect on either http or https.
After any switch it's wise to checkout:
SMTP Auth Problems - Zimbra :: Wiki
You can remove some of the prompts by having them install the certificates in their browsers - even better of course is to use a
Commercial Certificates - Zimbra :: Wiki
(New in 5.0 is an extension in your admin console gui that you can use to do that process a little easier, it generally works with most certs - there's one or two things that will be in the next release to correct minor issues/design shortcomings with that extension.)
Hows the other issue of this thread - did testing from other operating systems change the outcome at all?