I would appreciate, if anyone can confirm this application compatibility with windows server 2016 and are this product versions still supported by SAGE? 

As a failback plan, we have VMware snapshots, clone of the VM's along with data and server backups (on hypervisor level) will be in place before the planned upgrade is initiated.

The intended upgraded process will be as follows, please confirm if the sequence confirms to the Sage application’s requirements:

1. Stop services and set services to “Disabled” Startup type.
2. Disable network connectivity to server.
3. Perform in-place upgrade from Server 2012 R2 Standard to Windows Server 2016 Standard.
4. Carry out several server- and health related checks and tests relating to the OS only.
5. Activate Windows Server 2016 Standard.
6. Set services to “Automatic” startup type and start services.
7. Perform end-user testing.
8. Enable network access to server.
9. Perform hypervisor level backup.

Please confirm the following:

1. Is the Sage application supported on Microsoft Server 2016 Standard.
2. Are there any dependencies to the Sage application which require upgrading before- or after upgrading the server OS? And if so…
   1. Please confirm the dependency(ies) name and recommended version.
   2. Confirm the specific order sequence in which upgrades are required, if applicable.
3. Are there any integrations from the Sage software to another application, configured by Sage? And if so…
   1. To which server/ platform (please provide IP address).
   2. What ports are used for the integration(s) to communicate?