VDA failing to register with the error "The registration was refused due to AgentNotContactable".
Article ID: CTX340030
Updated On:
Description
Event ID: 1023
Source: Citrix Desktop Service
VDA failing to register with the error stating "The registration was refused due to AgentNotContactable".
Resolution
Add the DDC as a member of "Administrators" group in Computer Management > Local Users and groups
On the affected VDI, Go to ProgramFiles>\Citrix\Virtual Desktop Agent\BrokerAgent.exe.config and edit the file and change allowNtlm="false" to allowNtlm="true" and then test registration by re-starting Citrix desktop service.
On the affected VDI, Go to ProgramFiles>\Citrix\Virtual Desktop Agent\BrokerAgent.exe.config and edit the file and change allowNtlm="false" to allowNtlm="true" and then test registration by re-starting Citrix desktop service.
Problem Cause
The registration fails because the DDC is not able to connect back to the VDA due to SecurityNegotiationException issues.Issue/Introduction
This articles talks about registration issue of VDA with the Delivery Controller.
Additional Information
How to Troubleshoot VDA Registration Issues
https://docs.citrix.com/en-us/citrix-virtual-apps-desktops/secure/best-practices.html
https://docs.citrix.com/en-us/citrix-virtual-apps-desktops/secure/best-practices.html
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