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Assembly: Microsoft.Office.Interop.UccApi (in microsoft.office.interop.uccapi.dll)
This interface is most useful for an application to implement custom media negotiation in an application session. The application can enforce the correct content type and session description by examining and/or setting the properties of this interface before an session invitation is sent out.
Win32 COM/C++ Syntax
interface IUccOutgoingInvitationEvent : IUnknown