Citrix Licensing Config Service might fail to start because the default port 80 is in use by another application or service.

You can change the default port by completing the following procedures:

On the Machine that has Citrix Licensing Config Service

Open Windows Explorer.exe and browse to C:\Program Files (x86)\Citrix\Licensing\LicensingConfig\Service
Note: Remove x86 for a 32bit machine.
Open Citrix.LicensingConfig.SdkWcfEndpoint.exe.minimal.config in a notepad and copy the complete document into memory.
Open Citrix.LicensingConfig.SdkWcfEndpoint.exe.config in a notepad, clear all lines in it, paste the contents that you had copied into this document, save and close.
Run command prompt as an administrator.
Browse to C:\Program Files (x86)\Citrix\Licensing\LicensingConfig\Service.
Note: Remove x86 for 32bit machine
Type: Citrix.LicensingConfig.SdkWcfEndpoint.exe /SDKPORT <PORT>*
*For example: Citrix.LicensingConfig.SdkWcfEndpoint.exe /SDKPORT 8080

On the Machine that is Running the DDC

Run Powershell and load all the Citrix Snap-ins (add-pssnapin citrix*).
Type: Remove-ConfigServiceGroup –ServiceGroupUid “5daf5329-90cf-470a-bfc6-eb0ffa0c4bd6”
Type: $d = Get-LicServiceInstance –AdminAddress <licenseServer>:<port>*
*For example: $d = Get-LicServiceInstance -AdminAddress mylicenseserver:8080
Type: $d.ServiceGroupUid = “5daf5329-90cf-470a-bfc6-eb0ffa0c4bd6”
Type: $d.ServiceGroupName = “LIC”
Type: $d | Register-ConfigServiceInstance

After completing the procedure, you can verify if it is working as expected by starting the Desktop studio.

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