The approach to tracking correspondence status using nested logic is sensible, but the specific formula reveals a friction that shouldn't exist. You are asking Excel to read dates and keywords in a specific order and return a status, which is a straightforward request that the tool should handle gracefully. The #Name error you are encountering is likely a sign that the `ISDATE` function isn't recognized in your version of Excel, or that the syntax needs to be adjusted for 365. That is not a failure of your thinking; it is a limitation of the tool's accessibility.
The practical challenge here is that you are trying to make a legacy spreadsheet behave like an intelligent workflow system. You want Column M to act as a dynamic, automated status field that updates as you input dates into columns E, G, H, I, and K. That is a powerful idea. The problem is that even a well-constructed IFS statement in Excel requires you to manually account for every possible combination of filled and blank cells, and it struggles to treat dates as reliable triggers. Your logic, checking for cancellation or hold first, then checking for completion based on the last date entered, is correct. The tool is simply not built to handle that kind of conditional flow without brittle, error-prone formulas.
We believe you should stop fighting the spreadsheet and start exploring a smarter alternative. The fact that you need to sort and count by location status means you are already thinking in terms of a database, not a grid of cells. An AI-native spreadsheet can infer that if a date appears in column K, the item is "Completed," and if a date appears in column I, it is at "TEXT5", without you having to write a fragile nested function. It can also handle the occasional "Hold" or "Cancelled" entry as a simple text override, not a formula-breaking exception. You have the logic mapped out; you just need a tool that understands logic as a native language, not as a workaround.
Stop debugging the formula and start discovering a tool that treats your workflow as a set of rules, not a series of cell references. The solution is not a better IFS statement. It is a system that lets you define statuses by precedence and then automatically updates every row the moment you type a date. You have already done the hard part: you know what you want to track and in what order. Now, let the technology handle the execution.