We have been using Zimbra for about 2 years now and we are about to implement RSA SecurID/Authentication Manager. I have tried to see what is out there about integrating it, but can't seem to find much. I am authenticating my Zimbra users using Active Directory, so i think that part won't be tough. However, I am concerned about integrating Zimbra and ActiveSync with iPhones. I don't want to have to have my users enter a password every single time they get a message on their phone.
I'd be interested in seeing if anyone has done this or if Zimbra/EMC has any info, since EMC owns both Zimbra and RSA.