We described the electronic states of azobenzene functionalized with a single OCC using the EOM-EA-CCSD method. We also used this method to optimize the structure of the molecule in its ground electronic state. We then used this method to compute the low-lying excited states at the optimized geometry. We note that EOM-EA-CCSD can only accurately describe states dominated by the OCC transitions because states involving molecular orbitals of the scaffold will appear as 2p1h (two-particle-one-hole) excitations. To gain access to these states, we calculated excited states with EOM-EE-CCSD starting from an open-shell doublet reference.