smbclient -L <IP> -U Administrator

Sharename       Type      Comment
    ---------       ----      -------
    ADMIN$          Disk      Remote Admin
    C$              Disk      Default share
    IPC$            IPC       Remote IPC
    MyShare         Disk
    Users           Disk
Reconnecting with SMB1 for workgroup listing.
Connection to <IP> failed (Error NT_STATUS_RESOURCE_NAME_NOT_FOUND)
Failed to connect with SMB1 -- no workgroup available

mount -v -t cifs //<IP>/MyShare /mnt -o username=Administrator

mount error(2): No such file or directory
Refer to the mount.cifs(8) manual page (e.g. man mount.cifs)

mount -v -t cifs //<IP>/MyShare /mnt -o username=Administrator, vers=2.0

mount -v -t cifs //<IP>/MyShare /mnt -o username=Administrator, sec=ntlmv2