==== Required information ====
- iRedMail version (check /etc/iredmail-release): 0.92
- Linux/BSD distribution name and version: Ubuntu 14.04 LTS
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): Same problem, all backend options
- Web server (Apache or Nginx): Nginx
- Manage mail accounts with iRedAdmin-Pro? Not yet.
- Related log if you're reporting an issue:
====

as it says - quite frustrating.

clean ubuntu install, fresh download of Iredmail, tried several options, all same result.

install fails with;
E: Unable to locate package sogo-activesync
E: Unable to locate package sope4.9-gdl1-mysql
E: Couldn't find any package by regex 'sope4.9-gdl1-mysql'

sure enough - these packages don't exist under the 'trusty' tree on the SoGo repository.

also, the script's command to add the Sogo repo works, but the key import doesn't - I had to do that manually, and force an apt-get update to see anything in the repo at all.