1. A method of testing a change in a configuration of a computing environment, the method comprising the steps of: a computer determining a first set of one or more configurable attributes of a first user identifier (ID) of a first user in the computing environment, the first user ID having been received from a second user logged into the computing environment using a second user ID providing the second user with an authority of an administrator in the computing environment; the computer generating a temporary user ID having a second set of one or more configurable attributes so that values of respective configurable attributes in the first and second sets of configurable attributes are identical; the computer associating the change in the configuration with the temporary user ID and with no other user ID; and based on the change in the configuration being associated with the temporary user ID and with no other user ID, the computer performing a simulation with the change in the configuration applied in the computing environment, the change in the configuration not affecting the first and second user IDs.