@scottalanmiller said in Anyone Using Collabora and NextCloud Behind NGinx?:

Not sure how I should have things configured. I believe that I followed all of the instructions properly, but it is not working and there are no really clear instructions for a dual server scenario. All of the official stuff lists single server and Apache.

The one thing I remember having issues with was that it wants to communicate over the same "channel" in between the Collabora and NextCloud servers, so if the external browser connection is https, then it's not happy and throws errors if the back end isn't communicating over https as well. Getting that https channel setup with the recommended Drupal container and instructions for that didn't seem to work, and was such a pain I gave up trying to get it fixed at the time.