Upgrading server windows o/s, and cognos analytics version - advice sought

[Penny]

HI everyone

We are currently running Cognos Analytics 11.1.3 on Windows Server 2012 R2 Datacentre.   

I am currently planning an upgrade to Windows Server 2016 and also an upgrade to Cognos Analytics 11.1.7.

The server support team is recommending an in-place upgrade of the Windows server operating system, and I wondered if any of you had experience with this and/or any advice.

I am also trying to determine if the O/S upgrade should go first, or the Cognos Analytics Upgrade.  Again I am seeking advice.

I can see from the supported versions on the IBM website that both versions of Windows (2012 and 2016 are supported).

I welcome any feedback and thank-you in advance.

[Penny]

We upgraded the server operating systems to Server 2019, and then applied the upgrade.  All went well.