Automatic configuration of cell assignment of non-Inter-Cell Interference Coordination (ICIC)-engaged remote units in a wireless distribution communications system (WDCS) to non-ICIC-engaged WDCS cells to avoid or reduce dividing radio resources. The WDCS is configured to identify which remote units are “ICIC-engaged remote units.” A cell assignment configuration circuit is configured to identify ICIC-engaged WDCS cell(s) (i.e., in ICIC relation with a neighboring cell) among the WDCS cells in the WDCS, based on determining the WDCS cells assigned to ICIC-engaged remote units. The cell assignment configuration circuit is configured to determine a cell assignment configuration for the WDCS based on reassigning non-ICIC-engaged remote units assigned to the identified ICIC-engaged WDCS cells to non-ICIC-engaged WDCS cells. In this manner, radio resources for servicing non-ICIC-engaged remote units are not divided among non-ICIC-engaged remote units.