ServiceDesk Plus Settings return "Invalid Authentication Key"


You are trying to integrate Endpoint Central and ServiceDesk Plus applications. When you specify an authentication key, you see the error 'Invalid Authentication Key'. When you want to install or uninstall software applications and log help desk requests as tickets using ServiceDesk Plus, you are required to generate and enter an authentication key while integrating Endpoint Central with ServiceDesk Plus. You must make the following settings to generate an authentication key:


You will see this error in the following cases:

  • Specified authentication key is no longer valid or has expired. If you have set the key to expire after sometime, check the expiry date.
  • Authentication key has been regenerated by a ServiceDesk Plus technician
  • ServiceDesk Plus technician for whom the key was generated has been deleted
  • Technician creation has not been saved after generating the API key


  • Ensure that you have ServiceDesk plus administrator role to generate Authentication key.


You are required to generate a new authentication key in ServiceDesk Plus and specify it in  Endpoint Central. To generate a new API key in ServiceDesk Plus, follow the steps given below:

  1.  Generating Authentication key
    1. Log in to ServiceDesk Plus
    2. Go to Personalize tab available in the top pane
    3. Click API key Generation
    4. Specify the date of expiry
    5. Click Generate

      Note: This key is entered when a technician key is required for web service API requests.

    6. Click Save

      Note: You can also edit an existing technician's role and enable login.

  2. Pasting the API key in Endpoint Central
    1. Login to the web console.
    2. Click the Admin tab
    3. In the Integrations section, click ServiceDesk Plus Settings
    4. Modify the ServiceDesk Plus server details, enter the generated API key and save.

Applies to: ServiceDesk Plus Integration, Software Deployment, Software Installation, Remote Software Distribution, Uninstalling Software from desktops

Keywords: ManageEngine ServiceDesk Plus, Centrally Administer Software Installation, Centralized Software Deployment