https://forums.zotero.org/discussion/comment/434751/
Box.com WebDAV sync no longer working - Zotero Forums
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https://www.cloudhq.net/synchronize/amazon_s3/webdav
Amazon S3 WebDAV - Sync and Integrate - cloudHQ
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https://www.multcloud.com/support-clouds/dropbox-business.html
Sync Dropbox Business to Google Drive, Dropbox, OneDrive, OneDrive for Business, WebDav, FTP,...
You can migrate, sync, or backup data from Dropbox Business to other online storage services like Dropbox personal, OneDrive, OneDrive for Business, Google...
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https://forums.zotero.org/discussion/comment/469414/
Fail to sync with InifiniCloud WebDAV - intermediate certificate issue - Zotero Forums
Zotero is a free, easy-to-use tool to help you collect, organize, annotate, cite, and share research.
failsync