Problems connecting Debian to Windows SMB share using smbclient?

I'm having problems connecting my Debian Linux system to my Windows SMB share. The other windows VMs have no problem mounting the drive, just Linux. * This VM is connected to the AD by realmd, and using sssd. **The ERROR -**

gensec_spnego_client_negTokenInit_step: gse_krb5: creating NEG_TOKEN_INIT for cifs/windows-2016-dc failed (next[(null)]): NT_STATUS_NO_MEMORY

**What I've done so far** Installed samba, samba-common samba-client mkdir /mnt/smb Within the /etc/samba/smb.conf

workgroup = MYSERVER.ads.com

Right at the bottom

[smb]
comment = SMB
path = /mnt/smb
browsable = yes
writable = yes
read only = no
guest ok = yes
create mask = 0666
directory mask = 0777
force directory mode = 0777
valid users = @admin, @staff, @developer

sudo service smbd restart test parm sudo smbclient "//windows-2016-dc/SMB" -U administrator