Opening a remote resource (e.g., using WebDAV) requires providing authentication parameters (user name and password). For resources supporting single sign-on protocols supported by LO, user may also use "system credentials" using respective checkbox in auth dialog. If user also checks "Remember password", then the URI is stored in the org.openoffice.Office.Common::Passwords::AuthenticateUsingSystemCredentials string list, and after that, connections to that URI are always made using system credentials first. The proposal is to have additional advanced configuration option that would automatically try system credentials before showing the auth dialog to the user, for all URIs, even absent from AuthenticateUsingSystemCredentials, to avoid extraneous UI e.g. in corporate environments.
A patch is under review: https://gerrit.libreoffice.org/#/c/37297/
Mike Kaganski committed a patch related to this issue. It has been pushed to "master": http://cgit.freedesktop.org/libreoffice/core/commit/?id=ffd8e6b44e7dacb28047661fd6b73061790761cf tdf#107649: add TrySystemCredentialsFirst config option It will be available in 5.4.0. The patch should be included in the daily builds available at http://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More information about daily builds can be found at: http://wiki.documentfoundation.org/Testing_Daily_Builds Affected users are encouraged to test the fix and report feedback.