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Microsoft's Unified Communications Play: Page 3 of 5

Users can exercise some control over presence management, such as letting others know they are in a meeting or otherwise unavailable. Users can also indicate a preferred method of contact, such as a voice call or an e-mail. Presence information can also extend to mobile phones that run Windows Communication Mobile.

Microsoft offers privacy settings so that users don't have to broadcast information such as their Outlook schedules or calendars in the presence function.

If companies need to record and log IM conversations, an Archiving server uses SQL to store and search previous chats. This is an enterprise-class feature for companies that are required to record communications. Companies that don't have to store all conversations should be judicious in how much data they save.

The Archiving server also lets users view and search previous chats in Outlook 2007, much like GMail's logged chat feature. It will store previous conversations from the Communicator client in a folder in your users' inboxes for easy searching. However, you need Outlook 2007 to take advantage of this feature.

Communicator encrypts all IM traffic among OCS users. IMs with users on public IM clients are not encrypted, which is something to consider if you have security concerns. OCS does not disable the use of other IM clients. If you want to limit user access to other instant messaging systems, you will need a third party solution such as proxy.