Why aren't you using Exchange Server? It's really the heart of the SBS. Without it, you have miss out on these benefits:
Automatic Deleted Message Retention and Retrieval
Single-instance storage for messages addressed to multiple recipients -- meaning if an attachment is sent to multiple users it is stored only once
Online backups can be made.
Transactional integrity of the message flow - meaning there is an audit trail
Users have access to Exchange Public Folders.
Ability to work offline as needed
Server-based rules that control how the server handles messages on reception.
Security is integrated with Small Business Server security -- meaning only one username and only one password
Anti-virus is handled centrally
Real-time delivery of messages
SharePoint/Companyweb integration and alerts
Centralized Calendaring
Easy portability of user mailboxes and messages when empoyees leave
Outlook Web Access
RPC over HTTPS access that allow users with laptops to connect to Exchange with any Internet Connection while out of the office
Microsoft Office integration
Delegate access
There are others, and I'm sure some of these may not be important to your situation... but I've always found that Exchange solves many more issues for a company than it could ever cause.
Even if you don't use the full power of Exchange's SMTP Server you should at least use the SBS POP3 Connector to download their current POP3 Email Accounts so that at least there is centralized backup and remote access. Plus, internal mail will not have to go out over the Internet and come back in.
With regards to your question of whether its necessary to unjoin/rejoin the workstations? You don't have to if you don't want to... but in my experience, you'll decide a few months from now that you want to start using Remote Web Workplace (one of SBS's coolest features -- see
and when you try to turn it on... it won't work and you might spend hours trying to figure out why. RWW is just ONE of the things that's automatically configured when you join workstations the correct "SBS-way".
Jeffrey B. Kane [MVP - Small Business Server]
TechSoEasy
Blog: