[Zope] WebDAV access from MS-Office

Hi! Is someone accessing zope from MS-Office with webdav daily? What are your experiences? Some weeks ago there were several complaints that files were not accessible because they were read-only. My application will have about 30 people using it at one time. The files will be regular office files. The avarage file size will be around 100-300kByte. The network will be a 100MBit Ethernet. Is it possible to use umlauts in file names? thomas