Iissync.exe calls the IMSAdminReplication::Propagate method on the source computer if the signatures provided by the source and target computers differ. This method receives the name of the target computer so your program can transfer data to the target computer by your choice of means.
virtual HRESULT STDMETHODCALLTYPE Propagate(
/* [in] */ DWORD dwBufferSize,
/* [size_is][in] */ unsigned char __RPC_FAR *pszBuffer
) = 0;
Return NOERROR if your method succeeded. If your method returns any code other than NOERROR, iissync.exe will discontinue the replication process for the target computer.
IMSAdminReplication::GetSignature, IMSAdminReplication::Propagate2, IMSAdminReplication::Serialize, IMSAdminReplication::DeSerialize