Security Update for Microsoft Lync 2010: October, 2012

Microsoft released Lync 2010, v4.0.7577.4109
See description in KB2741517 and download from here x86 or x64

Microsoft Office Communications Server 2007 R2 XMPP Gateway: September 2012

Microsoft released Office Communications Server 2007 R2 XMPP Gateway, v3.5.6907.263
Se description in KB2742290 and download from here

Microsoft Office Communications Server 2007 R2 Group Chat: September 2012

Microsoft released Office Communications Server 2007 R2 Group Chat v3.5.6907.265
See Server description in KB2728998 and download from here
See Client description in KB2735021 and download from here
See Administration Tool in KB2728997 and download from here

Update Rollup 7 for Exchange Server 2010 Service Pack 1

Microsoft has released Update Rollup 7 for Exchange Server 2010 Service Pack 1
See info about the update in KB2743248 and download from here

Update Rollup 8 for Exchange Server 2007 Service Pack 3

Microsoft has released Update Rollup 8 for Exchange Server 2007 Service Pack 3
See info about the update in KB2734323 and download from here

Update Rollup 4 for Exchange Server 2010 Service Pack 2

Microsoft has released Update Rollup 4 for Exchange Server 2010 Service Pack 2
See info about the update in KB2706690 and download from here

Microsoft Forefront Unified Access Gateway 2010 SP2

Microsoft has released Forefront Unified Access Gateway SP2
You can get it here