Error: The server is not operational displayed when trying to get user or group from trusted domains (4377260)

When trying to search for the users or groups from a trusted domain from the Group and User Management module using the Network node, the error message 'Error: The service is not operational' is displayed.

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You will need to add a search scope to access trusted domains:

• Click the Search tab available in the Group and User Management module, then click the Add Scope button.
• From the Add Search Scope window, click the arrow next to Active Directory and select the OUs where users and groups will be searched and click OK.
• Click the Start Search button to initiate the search within the selected OUs