Since a few weeks we have a Zimbra server running, first we used the OpenSource Comunity version, yesterday we upgraded the server to the Network edition to have more sync functions.
On this moment we can't connect to the Zimbra server over the Exchange protocol with for example a iPad / iPhone. We used this tutorial to find out how it works:
Zimbra - iPhone
But we have the following problems when we try to connect with our iphone / ipad.
- The certificate from "autodiscover.domain.com" for account "email@example.com" could not be verified. (we can accept this manually)
- Unable to verify account information
We can't connect to mailboxes on the Zimbra server!
Our Zimbra server is colocated in a Datacenter and we connect remotely from our office to the server.
Our firewall is configured well, the ports that are enabled are:
SMTP 25 tcp
HTTP 80 tcp
POP3 110 tcp
IMAP 143 tcp
LDAP 389 tcp
HTTPS 443 tcp
SMTPS 465 tcp
IMAPS 993 tcp
POP3S 995 tcp
(Admin Interface) 7071 tcp
What could be the problem?