Messaggio di browser troppo vecchio quando si forza la "modalità compatibilità" in IE 11

Unfortunately, changing Compatibility View Settings in our corporate environment is not possible due to restrictions and some other issues.

I have tried going the route of adding the header from within the container:
added add_header “X-UA-Compatible” “IE=Edge”; in /etc/nginx/conf.d/discourse.conf below “server {”
and restarted nginx (service nginx stop; service nginx start;)

as well as added “<meta http-equiv=“X-UA-Compatible” content=“IE=Edge,chrome=1” />” via Customize → Edit CSS/HTML.

The first workaround added the header in a v1.8.x Discourse deployment, but same thing done in a v1.9.x deployment does not work. I checked the headers with Fiddler and the additional header is not in there with v1.9. The additional meta-tag is indeed in, but does not “switch off” compatibility mode, maybe because it is too far below and not the first meta entry.

Tried a complete rebuild and then changing the dicourse.conf again, too - just to exclude that I messed up something - same effect.

I am trying to get v1.9.x working with IE11 in the local network since a while now and am a bit lost I have to admit. I have opened a topic some while ago, too, and have been asked to continue here: https://meta.discourse.org/t/ie11-in-compatibility-mode-intranet-is-getting-your-browser-is-too-old/66185

Is there anything I’ve missed in terms of changes made to the nginx-setup within the container in v1.9? Do I need to set the header elsewhere, too?

Thanks a lot in advance and cheers
Thomas