Thanks, KevinH.
Other than that, the only major issue that I've found so far is that I have no administrative interface (which is definitely a showstopper). Going to
https://(host):7071 prompts me to accept a certificate, then directs me to /zimbraAdmin, which reports a 404, "The requested resource (/zimbraAdmin) is not available."
I'm assuming (perhaps incorrectly) that zimbraAdmin is at /opt/zimbra/jakarta-tomcat-5.5.7/webapps/zimbra/
js/zimbraAdmin. That directory only contains one subdir, called config.
Any tips for next steps?