In Microsoft Excel, spilled array formulas cannot spill into merged cells. Unmerge the cells, or move the formula to another range that does not interconnect with merged cells.

Microsoft Excel's new FILTER() function is a great tool for reporting and dashboards. We'll show you how to use it to get more done.

Once deleted, add the array formula again in the first cell and then copy it down to the required cells. Read: Excel ran out of resources while attempting to calculate formulas.

Microsoft Excel's dynamic array function XLOOKUP() might completely replace VLOOKUP() and HLOOKUP().