Offline Maven issues

I have 2 identical servers, one has internet connection, the other does not. 

I built the Maven / web app in IntelliJ on the internet connected machine, everything works fine. 

I copied the project over to offline server to do some debugging, but I get errors in pom.xml:

Failed to read artifact descriptor for javax:javaee-api:jar:8.0

Failed to read artifact descriptor for org.bouncycastle.........

I copied the dependent jar files into the local maven (On Windows, user/.m2/repository/.....

When viewing pom.xml in editor - these errors appear when hovering over the 'project' tag. I also do not see the external libraries in project view that I see on the online system. 

When doing a build, it complains about these external missing libraries.