You are permitted to access the account with WebDAV. This is the default setting for the Exchange server, so unless your system administrator has specifically turned it off, no changes should be necessary.
Baduzula baimena kontuan WebDAV-ekin sartzeko. Hori da Exchange zerbitzariaren ezarpen lehenetsia, beraz, sistema-administratzaileak aldatu ez badu behintzat, ezer duzu ezer egin beharko.