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By default this privilege is only assigned to the Cloud Administrator role.
To display the Key button, configure the following UI property: client.virtualmachine.guestinitialpassword.enabled. For more details see Configure Abiquo UI
Administrators should also note that the UI label of the privilege that allows a user to access the default credentials of a template has been changed to "Retrieve default template credentials". This allows a user to access the default root credentials of a VM by clicking the "Default credentials" button on the dashboard.