Cannot open any Office file with WebDAV. Error message "The file ... cannot open because the file format or file extension is not valid (Network Steve Forum)

Cannot open any Office file with WebDAV. Error message "The file ... cannot open because the file format or file extension is not valid

I try to connect to a SBS2011 server using WebDAV, but cannot open any Office files. When I try to copy them first to my local system it works fine. Opening PDF and TXT files works fine as well.

We have four other servers (SBS2011 and 2008R2) hosting WebDAV solutions, but no problem there.

I think it has something to do with the security, because Wireshark is mentioning security level warnings. But it isn't clear to me what's going on.

I tried to change the registry of my client to enable Basic authentication. But that doesn't work either. When I use a third party tool like Cloudsafe then it works fine, but unfortunately that's no option here.

I hope to find the solution on server side, somebody with tips?

Thx in advanced.

Edited by Guido Knote 15 hours 17 minutes ago

March 23rd, 2015 12:08pm

This topic is archived. No further replies will be accepted.