Hi Miggi03,
Windows XP includes the WebClient service that enables Windows-based programs (Like the Web Publishing Wizard) to create, access, and modify Internet-based files on Internet file servers using the WebDAV protocol.
In this case, you mentioned all users that are using Windows XP cannot use the WebDev protocol to update file. So, the issus seems to be caused by the WebClient service is not enabled.
Please enable the WebClient in all Windows XP clients to fix the issue.
Thanks,
Jinchun Chen
Jinchun Chen
Forum Support
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support, contact tnmff AT microsoft.com(Please replace AT with @)