Currently monitoring and attempting to reproduce the issue.
You may schedule a remote troubleshooting session via the official website's Live Chat when you have time.
Currently monitoring and attempting to reproduce the issue.
What version of TOS are you currently using?

SomeGuyInCalifornia wrote: ↑25 Sep 2025, 11:57 I'm having the same issue on a similar model. I have a domain controller running Samba-AD-DC on a Debian server. Other Windows and Linux hosts can join the domain, but my F4-424Pro cannot join the domain. The system is running version 6.0.783, has a static IP on the same subnet as the DC, and has the DNS server set as the IP of the DC.
In the File Services control panel, I switched the minimum version to SMB2, but the error message continues to display "SMB workgroup set incorrectly". I provided screenshots, but blurred out the domain and workgroup names, which are the same. I've also verified that the username and password combination are good, and used them on other systems. I also tried the domain-administrator account, but it failed with the same error, too.
When I SSH into the NAS and run the smbclient command to list:Code: Select all
# smbclient -L dc0.domain.local -N Anonymous login successful Sharename Type Comment --------- ---- ------- sysvol Disk netlogon Disk IPC$ IPC IPC Service (Samba 4.22.4-Debian-4.22.4+dfsg-1~deb13u1) Reconnecting with SMB1 for workgroup listing. smbXcli_negprot_smb1_done: No compatible protocol selected by server. protocol negotiation failed: NT_STATUS_INVALID_NETWORK_RESPONSE Unable to connect with SMB1 -- no workgroup available
Hi, as we cannot see your complete email address when receiving your message, our reply failed.