Nextcloud (non Docker) w/ ONLYOFFICE Document Server (Dockerized)

Steps to replicate

  1. Ubuntu 16.04 LTS (sudo apt-get update && sudo apt-get upgrade)
  2. Install Nextcloud
    No issues.
  3. Install ONLYOFFICE Document Server
    HOWTO - What to do for having Nextcloud / OnlyOffice on the same host?
    1 Issues.
    Error when trying to connect (Error occured in the document service)

Further issues.
Will Zimbra Drive work with ONLYOFFICE? If not, I will dump this Zimbra and went straight ahead to ONLYOFFICE Community Edition.

I’ve been running Zimbra OSE for my business for the past of 1 month (too much attachment, 1 mail can go up to 128 MB at a time)