==== Required information ====
- iRedMail version (check /etc/iredmail-release):  v0.9.4
- Linux/BSD distribution name and version: CentOS 6.7
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MYSQL
- Web server (Apache or Nginx): Apache
- Manage mail accounts with iRedAdmin-Pro? N/A
- Related log if you're reporting an issue:
====

I am trying to figure out how to obatain full outlook functionality with iredmail.  This would include the following:

1). Users have the ability to share calendars other users in outlook
2). Users have the ability to open and edit shared calendars in outlook
3). Ability to share or assign tasks
4). Ability to share contacts, create contact groups

From my understanding I could use iredmail, sogo and openchange/samba4 to get this functionality in outlook but it appears that iredmail is not fully supported with openchange/samba(please confirm).

I already have a server running iredmail with sogo using mysql.  Can i just dump openchange/samba ontop of my current installation on centos or would you recommend me starting with a fresh box?  I read another thread that said to install in the following sequence:

1. Install Samba4
2. Install OpenChange
3. Install iRedMail with LDAP and change all the LDAP information, so that it tries to authenticate users against Samba4

Please confirm that these are indeed the steps if i need to build a new box.

Thanks for all the help