IPP limitations / specifications

Hi,

I would like to know if there is any official document from Microsoft which limitations the microsoft IPP implementation have?

I found that Microsoft droped IPPS but on some technet documents they still talk about IPPS.

Also I would like to know if standard properties are transfered via IPP same as RPC?

Is there also a change to allow only IPP URLS which are member of the domain , same as RPC?

From server 2012 Microsoft dropped Unix Printing Services and prefered Unix systems to use IPP. Would be interested if Microsoft is now supporting IPP2.

Thanks