Is Unified Collaboration API 1.0 Type Library required for Office 2010 integration

Hi,
    
I am integrating Office applications with custom IM solution. I have implemented the COM class as suggested by http://msdn.microsoft.com/en-us/library/office/jj900715.aspx

I have also registered the COM implementation and hosted the COM server in my exe.

Do I also need to additionally register the typelibrary of my com class ?

I am seeing issues with type library regsitration and lync client 2013.

When I uninstall the type library, Lync Client breaks

    Generic COM Exception. Code is 0x80080005.
    at Microsoft.Lync.Model.LyncClient.EnsureOI()
    at Microsoft.Lync.Model.LyncClient.GetClient()

I understand that Lync 2013 provides its own typelib which I am overwriting.

Is it required for me to register my typelib for Office integration to work ?