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

Client Virtualization in Microsoft Lync 2010

Microsoft has released the Client Virtualization in Microsoft Lync 2010 document - July 2012
You can get it here

Microsoft Office Communications Server 2007 R2 Group Chat: July 2012

Microsoft released Office Communications Server 2007 R2 Group Chat Server/Client v3.5.6907.258
Se Server description in KB2728998 and download from here
Se Client description in KB2735021 and download from here

Updates for Microsoft Lync 2010 for Android: June 2012

Microsoft released an update for Microsoft Lync 2010 for Android, v4.0.5324.3000
See description in KB2716895 and download from here