Our firm has begun to use Office Communication Server for instant messaging. We were using MSN Messenger but there was underlying concern about using a personal instant messenger for Business Communications.
Yahoo, MSN, AOL, and other instant messenger programs are not secure. Therefore if you send messages with confidential client information you are potentially allowing your client’s information to get stolen. I know many firms that use these type of instant messengers and this can leave an open door for a breach of client confidentiality.
Office Communication Server is completely secure so when I am at a client’s office and ask my assistant through communicator what is the admin password for the client’s server, I do not have to worry about that information being leaked to the entire world.
1. Through Software downloaded on the workstation.
2. Through a web based portal available in Internet Explorer and Fire Fox.
3. On a Windows Mobile or Blackberry Device

1. Conservations are archived and can be searched in outlook.
2. Easily allows you to send an Email Message through Communicator
3. When replying to an email in Outlook, you can send it as an instant message
4. Communicator will look at your Outlook Calendar and set your Availability Status depending on your appointments.
Advantages:
Disadvantages:
Somehow I duplicated all my contacts in outlook. This happens from time to time, especially if you have a third party link with a smartphone or a practice management software. Microsoft's answer to deleting duplicate contacts is to select each duplicate by holding down the control key and hit delete. When you have 900 duplicates, that is not really a good option.
I found TeamScope's Contact Scrubber for Outlook by using Google and it easily fixed the problem.
The Contacts Scrubber™ for Outlook® provides a means of easily eliminating duplicate records from your Outlook Contacts. It works by processing your Outlook Contacts, looking for possible duplicate items. As it finds duplicates, it presents them to you, displaying field-by-field comparisons of item data, and proposing a logical way of merging the item data into one unique item. You may then merge these items; you can opt to use the program's proposed merge, or override it with your own personal choices, on a field-by-field basis.
These settings will help stop spam from reaching your inbox.
Actions --> Junk Email --> Junk Email Options --> Safe Sender
Check "Automatically add people I email to the Safe Senders List." This will help stop a lot of false positives.
International --> Blocked Top-Level Domain List
I block all countries except the United States and Canada.
If you have workstations running Office 2007 in your office, it would be a good idea to download the Office 2007 Compatibility Pack. It will allow users of Office 2000, 2002, and 2003 products to open up 2007's xml format. I have started to install it on all client computers because users will start be receiving .docx from clients and other attorneys.
Express Click Yes is a program that will get rid of the annoying outlook message that tells your a program is trying to access your data in outlook. This is very good for Amicus, TimeMatters and PCLaw users who have links with outlook.