Offline file attribute specifies that file will not be physically available while working offline. When working in network environment with files stored remotely, they are only physically available while connection to this remote data storage persists. After turning off the remote computer or disconnecting portable device from the network, files stored remotely become physically unavailable.
However, with synchronization tools it is possible to create local copies of those network files. In this case files cached locally are marked offline which means that they are not original files while it is still possible to work with them. Synchronization tools also provide possibility to cache locally newest remote files upon log-in and log-off, thus making possible to work with those remotely files as if they were stored locally. Due to centralized use, you can always automatically have the latest files on your PC with just a simple operation of synchronization.
With Febooti fileTweak it is possible to change this attribute, however proceed with full awareness in order not to deprive yourself from the up-to-date offline content.