Hello after a long time,
For the last weeks, I struggled with the IT department of my company, and they weren't able to help me with a customized installation. I did not have the option to check out different content packs as you mention in your response. Long story short: I now have ACA 2018 installed...or only AutoCAD 2018, since the IFC icon still does not appear.
But: It seems that I have all functionality, just not with the comfort of clicking on icons, since e.g. the <ifcexport> command that I recently learned does work just fine. So am I just facing an icon-issue, while having all features that I just need to learn the command for?
Thanks everybody for your help. I'm sure your answers were heading in the right direction for those who have more admin control over their software installation, so I'll check them as accepted solutions to the issue, in case others have similar problems.
Regards,
Axel