No Server GUI – Avaya IP Office ACCS Ignition






We encountered a problem on the Ignition Wizard install of two Avaya IP Office ACCS Contact Centres, whereby after rebooting we could no longer see the Desktop after login, only receiving a black screen. Ctrl-Alt-Delete worked and we could run Task Manager OK, but not spawn Explorer. This happened to two separate 2012 R2 servers, at the same point in the installation process.

When you attempted to RDP to the servers and logon with the Domain admin account there are some errors raised in the Windows Application logs. In particular Event ID 18214

The machine-default access security descriptor for the COM Server application C:\Windows\System32\rdpclip.exe with APPID Unavailable is invalid. It contains Access Control Entries with permissions that are invalid. The requested action was therefore not performed. This security permission can be corrected using the Component Services administrative tool

This error message led me to start looking into DCOM permissions on the server. Below is where I found the modified permission, and the steps to fix it without explorer.exe:

  • CTRL+ALT+END to invoke Taskmanager
  • File > Run New Task
  • Browse to: C:\Windows\System32\dcomcnfg.exe & execute
  • Expand ‘Component Services’
  • Expand ‘Computers’
  • Right-Click ‘My Computer’ & select ‘Properties’
  • Select ‘COM Security’ tab
  • Under ‘Access Permissions’, select ‘Edit Default’
  • Change ‘SYSTEM’ object to remove ‘Remote Access’. Hit “OK”
  • From task manager, Start > Run > shutdown /r
  • Server reboots & GUI is restored

 





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