Error writing to the registry during Windows Logon Agent Install


When installing the AuthAnvil Windows Logon Agent or Credential Provider, you receive an error that says the installer cannot write SiteID2 to the registry.



If the Secondary URL and Site ID are left blank during installation, this error will occur. 



Uninstall and re-install the agent, providing a secondary URL and Site ID. If you don't have a failover server, enter the same settings as the primary URL.



If you have any questions or need some help, we would be happy to assist. Open a case at or send an email to

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