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Net Extender installation is damaged -OR- DUN error 711 when Remote Access Connection
03/26/2020 
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Description
SMB SSL-VPN: Net Extender installation is damaged -OR- DUN error 711 when Remote Access Connection Manager and/or Telephony Services are disabled.
Resolution
Problem Definition:
Net Extender installation is damaged -OR- DUN error 711
Possible cause:
the Routing and Remote Access Service is unable to start if the Remote Access Connection Manager service, Remote Access Auto Connection Manager, and the Telephony service are disabled.
Resolution or Workaround:
under services set the Startup Type to manual for:
Remote Access Connection Manager service,
Remote Access Auto Connection Manager,
and the Telephony service to Manual..
After you have made these settings, restart the Routing and Remote Access Service.
you may need to uninstall and re-install the NetExtender to replace the DUN entry that may have been corrupted or improperly installed.
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YES
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