@Xonline
i allow myself to intervene in what concerns collabora.
Collabora is unfortunately not the package you need to do online office editing.
Please have a look at this post.
It is as simple as 123 to install, all you need is a separate server (vm machine) independent of Nethserver
I am using it with 2 different Nethserver servers (one ONLYOFFICE instance)
The advantage over collabora , when you create an online document (say word) the collabora will create it with extension ODT then you cannot open it elsewhere.
Where with ONLYOFFICE files created online have same Microsoft office extension and they are 100% office 2010
example : I created a powerpoint with office 2010 and was able to see it with Microsoft powerpoint 2010 as well as with onlyoffice . Same format no changes.
Same file when opened with Collabora it changed the formatting of the fonts as well as some graphics.Therefore it changed the look of my presentation.
Ah it is much facter in loading than collabora
The only advantage is the 20 sessions limitation on the community version. for me it was very sufficient and could serve a community of 100 users by applying the 5/1 sharing which is very fair normally it is 10/1.