@edi
Good tutorial ! As you stated this requires some integration by the nethserver team
For those looking at Nethserver from collaboration point of view, the concentration will be towards Nextcloud and its offering features.
Unfortunately I was not able to contribute much on spreedme (under Nethserver) as I was busy delivering a solution with Spreedme and openfire blended with the nextcloud under Ubuntu 16.04
Nethserver is a good platform and has much more to offer than any other platform (open license) on the net, I was looking for enthusiastic collaborators to make things happen fast.
Once this Spreedme module is fully operational, the next step is to make Collaboraonline works.
Should a team works together to make Nextcloud up and running with the following :
Openfire 4.0.4 and 4.1 (I have it operational with Rosters),
Spreedme (operational but not in a friendly way) ,
Collaboraonline (operational) ,
Webrtc with SIP integration(operational but needs to be integrated into nextcloud)
With all above met the Nethserver will be the platform of choice.