Exchange GAL and Calendar
Posted on 2011-03-14
I'm attempting to do a couple of things for users who are outside of our LAN and do not connect through the Exchange protocol. Mainly, that is provide them with the same two features users on the LAN enjoy so much. That is access to the same Calendar that is part of their exchange account (i.e. When the logon using their domain credentials and use outlook, or log on to OWA), and access to the Global Address List. Note, users outside of LAN connect through secure IMAP and some through secure POP3.
First part of the question is:
- Is it safe to provide outside users access to GAL/calendar as I think I need to open up the ports for Secure LDAP or LDAP on the firewall. The Exchange 2010 server is on the domain as a member server, so it's tied into the main active directory services everyone uses to log onto the systems.
Second part of the question is:
- Which ports do I open to make GAL/Calendar available (securely) to outside users?
Third and last part is:
- What do I do to make the GAL show up in Outlook for users using IMAP/POP3, and is it the same for the Calendar? Some details would be appreciated. I'm assuming I don't have to do anything extra on the Exchange server as this type of functionality is already available through the Exchange protocol for users logged into the domain.