When a merged cell region is removed, the top-left cell in the region will retain the region's value. All other cells in the region will have a null value. In addition, all cells in the merged region will have the region's cell format when it is removed.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2