Hello, When it comes to RDS CALS, the version of the host OS for the licence server needs to match the CALs. Therefore if you have 2016 RDS CALs then you will need a 2016 licence server. However the 2016 licence server can have the lower version CALs installed on to it and it will provide licences to lower versions of Windows if you do not have the specific version of RDS CALs on the server.
This article at Microsoft explains the RDS CAL situation. https://technet.microsoft.com/en-us/windows-server-docs/compute/remote-desktop-services/rds-client-access-license The simple rule is the licence server can serve lower versions of Windows RDS CALS, but not higher. Hope this helps, Simon. -- Simon Butler MVP: Exchange Sembee Ltd. e: si...@sembee.co.uk<mailto:si...@sembee.co.uk> w: http://www.sembee.co.uk/ w: http://exchange.sembee.info/ w: http://blog.sembee.co.uk/ Need cheap certificates for Exchange, compatible with the iPhone? http://CertificatesForExchange.com/<http://certificatesforexchange.com/> for certificates from just $29.99. Sembee is a registered trademark. From: listsad...@lists.myitforum.com [mailto:listsad...@lists.myitforum.com] On Behalf Of Fut Dey Sent: 25 March 2017 19:25 To: ntsysadm@lists.myitforum.com Subject: [NTSysADM] MS 2008R2 RDS License Server and new OSes Hi Everyone, Our current Remote Desktop Services License Server (RDS-LS) and Session Hosts (RDS-SH) are all Windows 2008 R2. We are about to rollout Win 2012 R2 Session Hosts and have acquired RDS 2016 User CALs. The 2016 CALs are downgradable for lower versions of the Win Server OSes. Questions: 1 - Can the existing Win 2008 R2 RDS-LS server be leveraged to host the 2016 UCALs for RDS-SH hosts running Windows Server 2012, 2012 R2, and 2016? Or do I need to put up a Win 2012 R2 RDS-LS host to serve the Win 2012 R2 RDS-SH? 2 - Conversely, can a Win 2012 R2 or 2016 RDS-LS serve RDS-SH hosts running lower versions of the Win Server OSes since the UCALs are downgradeable? Trying avoid having to fire up an additional host if not needed. Not a big deal if one is needed. Thanks, Fut
