Not being able to open these files in the application in the original folder while being offline - is that issue enough? It is not that hard to find
more informations about related issues.
And I think this kind of problems is rarely discussed, because offline files is not a technology, which is often used in home environments. Therefore it is relatively easy for Microsoft to say, that this is not supported. Just as Previous versions and other stuff, you may know from a normal Windows Server 2003/2008.
Best greetings from Germany
Olaf