I have been looking at Zimbra as an potential solution to share calendars. I have a few Outlook users in my network, but the crust of it use various mail clients running mostly on Linux.
The thing is, I'd rather not change the architecture of my mail servers, for various reasons (the primary one would be "if it's not broken, don't fix it"), so I am wondering if I can somehow integrate Zimbra into it.
I believe there are two concerns: access to mailboxes and authentication. I can live with the whole Zimbra user interface, to the condition the mail client part of it can use a remote (or at least, external) mailbox.
Authentication should be easier: I use a LDAP database, so I can always find a way to connect the dots in order to make Zimbra use it.
Do people see either of those two issues as a major hurdle before I start hacking my way around them? I'm not afraid of writing code, but it can't take too much of my time and in the long term should remain possible to maintain. Stuff like Exchange or Scalix make it virtually impossible to actually use only the calendaring component.