http://wiki.siemens-enterprise.com/wiki/OpenScape_Office_with_Microsoft_Small_Business_Server

OpenScape Office supports groupware features like:

• Calendar Integration
• Public Folder Contacts search
• Send mails from OpenScape Office LX/MX or HX to Microsoft Small Business Server

Integration depends stronly on Small Business Server and OpenScape Office variants and versions.

Only Small Business Server variants and versions mentioned below are supported:

Microsoft Small Business Server 2011 Standard

SMB 2011 Standard is supported by:

• OpenScape Office LX/MX Version V3R1 and higher
• OpenScape Office HX Version V3R2 and higher

Administration details are decribed in the document:  http://wiki.siemens-enterprise.com/wiki/OpenScape_Office_with_Microsoft_Small_Business_Server