Unlike ground-state EDA, where orbital delocalization necessarily stabilizes the ground-state energy, the energies of the excited energies also depend on the "active space" used, which could increase or decrease the energies of a particular excited state. In principle, Hohenberg-Kohn-Sham DFT gives the exact energy of the ground state, but linear response theory introduces additional approximations. The Lu-Gao theorems of MSDFT establishes a foundation for exact excited state calculations as that of Hohenberg-Kohn theorems for the ground state. As in Kohn-Sham theory, an approximate matrix correlation functional is needed. In a range of studies, we have found that the approximations used in the present MS-EDA analysis yield good results for excited state calculations. The computed excitation energies for the present system are within 0.2 eV of the TDDFT values (see Tables and), and it is not clear which is more accurate without a thorough analysis. In view of the wide-spread use of the linear response theory, we have adopted the TDDFT values for the final adiabatic energies to determine the Δ𝐸𝐸 OCD term in MS-EDA. For the pentacene excimer, the OCD contribution raises the energy of the first excited state, but lowers those for the higher states. Currently, we have not separated the effects from orbital and configuration expansions, which would be of interest in future studies.