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In March 2553, Margaret Parangosky, director of ONI, interrogated Dr. Halsey in a cell on this station about the SPARTAN-II project and informed her that all of humanity believes her to be dead, also noting that she would be working for Parangosky.
In 2557, the Ur-Didact along with a contingent of Covenant Remnant arrived at the station from the Forerunner Shield World of Requiem, in order to steal the Composer from the station and use it against Humanity. John-117 boarded a Covenant Remnant Lich (which was part of a greater Covenant fleet accompanying the Didact's ship ) prior to slipspace travel from Requiem to Installation 03, after which he managed to enter Ivanoff station to attempt to hold off the Didact long enough to destroy the Composer. However, John-117 failed to do so resulting in the Didact using the Composer stolen from the station (via a tractor beam) to then 'compose' everyone remaining on the station in order to create more Promethean Knights (except for John-117, who was made immune to the composer's effects by The Librarian earlier on Requiem). John-117 and Cortana managed to obtain a Broadsword from the station's hangar bay and load it with a HAVOK Tactical Nuclear Weapon to pursue the Didact and destroy The Composer before he reached Earth. The status of Ivanoff station is still unknown to this day. It may be abandoned or it might have been revisited by the UNSC, re-staffed and commissioned back into functionality.