Unified Communications with Microsoft Lync, OCS 2007 R2 and Microsoft Exchange UM (Unified Messaging) from the leading Microsoft Voice Specialists in Scotland and the UK - Exactive. Instant Messaging (IM), Presence, audio and video conferencing. From Managed IT Services to Microsoft Infrastructure (Exchange, System Center, Active Directory). Exactive, the Microsoft Specialists in Scotland and the UK. IT support in Scotland and UK