This Error Event is part of Connect to WebDAV Events.
Event ID · 323400
Overview
The error message indicates that connection to the WebDAV server is not established. Any further operations with remote server will fail until reconnection attempt is made.
Solution
The error may be caused by connectivity issues such as firewall or antimalware whitelisting. Make sure that local machine can connect to the remote server—no firewall is blocking outgoing connections on the client, and incoming connection at the server.
Double check that your provided username & password, thumbprint, certificate and passphrase is valid and are in supported format. To pinpoint the problem, enable connection debugging option.

Event examples
See some examples of the Could not connect to WebDAV server Event messages:
- Could not connect to "webdav.company-inc.local". Error: Connection failed. Could not connect to server: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. Connection failed.
- Server certificate verification failed: certificate issued for a different hostname, issuer is not trusted. Connection failed.
- Could not connect to "dav.lan". Error: Password is set, but Username is not.
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