Group-Office stores all file names in UTF-8 on the server. Windows computers usually stores file names in Iso-8859-1.
Normally this is no problem. Uploading/downloading files to/from GO works great, and file names seems to automatically converted respectively.
However this does not happen when we compress files with GO:
1. Upload some files from Windows to GO (the file names should have some foreign chars in them)
2. In GO, compress those files to a ZIP archive.
3. Dowload and unzip that archive to the Windows machine.
File names will be "broken" - they are in UTF-8.