Use the ScheduleMeetingButton control in Lync Control applications to open a Microsoft Outlook meeting invite dialog with a bound contact.
Assembly: Microsoft.Lync.Controls (in Microsoft.Lync.Controls.dll)
The control is designed to mimic the functionality provided by the corresponding button on the Quick Connect toolbar of the ContactCard. As such, it must be bound to a contact using the Source property before it can be used. When clicked, it launches the Microsoft Outlook dialog to initiate the desired action with that contact. This button is not a general purpose Outlook Integration tool. It is intended to be used together with other Lync Controls to provide a full set of collaboration options for interacting with a specific contact or distribution group.