Recent versions of Windows servers (2012 and later) introduced a new version of CIFS (SMB) protocol used for shared drives (CIFS 3). In order to mount such shares using mount, one has to pass CIFS version explicitly, for example:

    mount -t cifs -o vers=3.0,uid=<user>,gid=<group>,user=<cifs_user> //server/share <where_to_mount>

However opening such share from Dolphin (4.14.2) simply using smb://server/share fails apparently because Dolphin doesm't pick the right CIFS version (mount also fails if version is not explicitly specified). Kio/smb should have some way either to detect CIFS version or to allow user to set it explicitly.

Reproducible: Always

Steps to Reproduce:
1. Open CIFS 3 share in Dolphin using URI like: smb://server/share
2. Input credentials


Actual Results:  
Opening the share fails with bad authentication even though credentials are correct.

Expected Results:  
The share should be opened.

It's related to changes introduced in CIFS 3.