Connecting to Sharepoint online

Hi Team,
I am unable to connect to sharepoint online from WinSCP.
The errors in the logs i get are :

. 2020-01-28 09:55:34.213 [hdr] X-MSDAVEXT_Error: 917656; Access+denied.+Before+opening+files+in+this+location%2c+you+must+first+browse+to+the+web+site+and+select+the+option+to+login+automatically.
. 2020-01-28 09:55:34.213 Header Name: [x-msdavext_error], Value: [917656; Access+denied.+Before+opening+files+in+this+location%2c+you+must+first+browse+to+the+web+site+and+select+the+option+to+login+automatically.]

I can attach logs if needed.
Alan.

Have you tried this?
https://www.koskila.net/how-to-fix-the-web-site-does-not-support-sharepoint-online-credentials-the-response-status-code-is-unauthorized-error/#Flipping_the_switch

I have same issue. Would like to connect with WebDAV method to sharepoint online (e.g. https://company.sharepoint.com/sites/sitename/libraryname). WinSCP return 403 Forbidden and after further analyzing it seems because of X-MSDAVEXT_Error.
Have tried the mentioned koskile link, but does not work. On connect with spo it ask for login, but when entering correct auth data it returns error "Current site is not a tenant administration site" or when not in domain "You can't get there from here".
This is not only issue of WinSCP, as a lot of programs seem to have this issue (f.e. cyberduck, total commander, filezilla, etc).
But there is proof it can work, as when map network drivein explorer with this url it does work and also the program "Allway Sync" is able to connect succesfully.

But the "Map network drive" does not use WebDAV, or at least not pure WebDAV.

Yes it does, but it uses windows internal (crappy) webdav, url sometimes changes to \\company.sharepoint.com\DavWWWRoot\sites\sitename\libraryname

Allway sync does use it's own webdav method.

Drit wrote:

Yes it does, but it uses windows internal (crappy) webdav, url sometimes changes to \\company.sharepoint.com\DavWWWRoot\sites\sitename\libraryname

That's not WebDAV, not even URL.

I know, i was just trying to show you when you map network drive with url (https) windows does use webdav for it...

https://github.com/tcsung/SharePoint-to-share-drive