When I deleted it I could re-register the servers.

Hi, with this modification on MainWindow.cs in

    private List<TabPage> GetNewTabPages()

adding this at the end:

This will add the tab back in XCP-ng Center but I don't think it works in XCP-ng 8.3.
I just upgraded from 8.2.1 to 8.3 when I logged into XCP-ng Center I saw the error message

Active Directory authorization is not available","Server 'xcp-ng-TEST' has failed to connect to the Active Directory server.

INTERNAL_ERROR: [ Xapi_systemctl.Systemctl_fail(""INTERNAL_ERROR: [ Subprocess exited with unexpected code 1; stdout = [  ]; stderr = [ Job for winbind.service failed because the control process exited with error code. See \""systemctl status winbind.service\"" and \""journalctl -xe\"" for details.\n ] ]"") ]","xcp-ng-TEST","Jul 11, 2025 3:58 PM","

# systemctl status winbind.service 

winbind.service - Samba Winbind Daemon
   Loaded: loaded (/usr/lib/systemd/system/winbind.service; disabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since Fri 2025-07-11 16:01:28 AEST; 3min 15s ago
     Docs: man:winbindd(8)
           man:samba(7)
           man:smb.conf(5)
 Main PID: 9593 (code=exited, status=1/FAILURE)
   Status: "Starting process..."

I haven't figured out what to do yet. None of the users can log into XCP-ng Center using their Active Directory credentials and only root can log in.

EDIT: Actually winbind wasn't even used in XCP-ng 8.2.1, I'm not sure why this service started up in 8.3.

XCP-ng 8.2.1# systemctl status winbind.service
● winbind.service - Samba Winbind Daemon
   Loaded: loaded (/usr/lib/systemd/system/winbind.service; disabled; vendor preset: disabled)
   Active: inactive (dead)
     Docs: man:winbindd(8)
           man:samba(7)
           man:smb.conf(5)

But I can see that windbind is used for XenServer 8.4 https://docs.xenserver.com/en-us/xenserver/8/users
Anyone got suggestions on how to get AD authentication working with XCP-ng Center again? Or add users manaully?

SOLUTION:
What I found after following the steps in the in the XenServer page above is that if I disable AD Authentication then re-enable it then it will work.

To Disable AD Authentication:
xe pool-disable-external-auth

Enable AD Authentication:
xe pool-enable-external-auth auth-type=AD service-name=full-qualified-domain config:user=username config:pass=password

Without the Users tab in XCP-ng Center, CLI command is needed to add or remove users. Refer to the XenServer page above.

xe subject-add subject-name=entity_name

Could you please shed some light on it, that I can download it?
Thanks for your help!

In LVMoISCSI.cs if you set:

var performSecondProbe = Helpers.KolkataOrGreater(Connection) && !Helpers.FeatureForbidden(Connection, Host.RestrictCorosync);

The SR can be created.

Maybe @michael.manley can update this and the modification to support attach iSCSI SR without error with gfs2

GFS2 isn't supported in XCP-ng at all, and is only supported in Citrix Hypervisor, the fact that it works is pure chance.

        private List<TabPage> GetNewTabPages()

adding this at the end:

           if (!multi && !SearchMode && (isPoolSelected || isHostSelected && isHostLive))
                newTabs.Add(TabPageAD);

the AD tab appears:

I test this modification and is working.

Maybe @michael.manley can update this and the modification to support attach iSCSI SR without error with gfs2

Hello, I noticed that in this new version there is no option to connect to the server via Active Directory. I still use version 20.04.01 and this feature would be very useful. I would appreciate it if you could return this option.

@michael.manley

Great Work, thanks for all

The update did not replace the old version (also different install location), but that's ok. I just uninstalled the old one and reconnected to the XCP servers.

Hi this is the result with pdb installed:

and:

Settings.txt

and the log:

XCP-ng Center.txt

and the log and settings:
Settings.txt
XCP-ng Center.txt

Debuggin XCP-Center I see in this
private static bool SameProductBrand(Host host)
{
var brand = host.ProductBrand();
return brand == BrandManager.ProductBrand || brand == BrandManager.LegacyProduct ||
BrandManager.ProductBrand == "[XenServerProduct]";
}
The value of brand is "Citrix Hypervisor" and BrandManager.LegacyProduct is "[Citrix Hypervisor]"
If I set in Branding.resx this:
<data name="LEGACY_PRODUCT" xml:space="preserve">
<value>Citrix Hypervisor</value>
</data>