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VDA Registration Failure with Event ID: 1001



Symptom: Cannot connect to Published Desktop (Multi user session)
VDA version: 7 220 3 LTSR CU3, Windows server 2019

Test ports with:
netstat -n -a

On VDA  I dont have any connection established on port 3268 with the Domain Controller.

Run a check with Powershell from VDA:
Test-NetConnection -ComputerName -Port 3268

ComputerName     :

RemoteAddress    :

RemotePort       : 3268

InterfaceAlias   : Ethernet0 2

SourceAddress    :

TcpTestSucceeded : True

The port 3268 if open


ListOFfDDC is in the registry


Log Name:      Application
Source:        Citrix Desktop Service
Date:          2023-12-28 16:54:54
Event ID:      1001
Task Category: None
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      .my.domain
The Citrix Desktop Service failed to obtain a list of delivery controllers with which to register. 
Please ensure that the Active Directory configuration for the farm is correct, that this machine is in the appropriate Active Directory domain and that one or more delivery controllers have been fully initialized. 
Refer to Citrix Knowledge Base article CTX117248 for further information. 
Error details: 
Exception 'The server is not operational.

Name: "my.domain"
' of type 'System.DirectoryServices.ActiveDirectory.ActiveDirectoryServerDownException'
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
    <Provider Name="Citrix Desktop Service" />
    <EventID Qualifiers="49152">1001</EventID>
    <TimeCreated SystemTime="2023-12-28T15:54:54.021141700Z" />
    <Security />
    <Data>The server is not operational.

Name: "my.domain"


I really appreciate if someone has any idea of why not VDA not has an established connection on port 3268 with the Domain Controller



Edited by Bit-101
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