Co-Authoring with SharePoint Server 2019 & Office 2016

[nancyfae]

I have a client who is upgrading to SharePoint Server 2019 but keeping Office 2016.  I am well versed with the co-authoring capabilities between SharePoint Online and Office 365, but I have no idea what co-authoring would look like with SP 2019/Office 2016 combination.  

Has anybody seen the SP 2019/Office 2016 combination in practice?  I would appreciate any insight you can share.  Thanks!

[#2]

To have co-authoring OnPrem, is not enough having SP 2016 or SP 2019, you also need to have your farm working with Office Online Server: https://docs.microsoft.com/en-us/officeonlineserver/office-online-server