Bug 136560

Description:
Apparently LibreOffice doesn't support OFBA. Support for it should be added because it offers high usability for complex authentication setups. For example OpenID identity provider can be used for WebDav, making proper popups for the authentication.

See https://docs.microsoft.com/en-us/openspecs/sharepoint_protocols/ms-ofba/30c7bbe9-b284-421f-b866-4e7ed4866027 for the open specification.

Steps to Reproduce:
1. Open a document from webdav resource that utilizes OFBA


Actual Results:
1. Get an access denied error

Expected Results:
1. User accesses something like SharePoint Server, and opens a document.
2. Since gssapi/kerberos failed, the application falls back to OFBA.
3. OFBA popup asks local authentication (typically ADFS based openid provider)
4. Authentication cookie gets saved
5. Authentication to webdav succeeds based on the previous steps
6. ... 
7. Profit!


Reproducible: Always


User Profile Reset: No



Additional Info:
OFBA is the most common authentication setup for accessing and editing documents while using Office 365 products in multitenant environments. It really rocks.