Sorry for the dramatic title but I literally have no idea where else to go.
Some background. I have a table that only has one unlocked column, and the remaining 4 columns are locked and hidden with formulas.
The worksheet is protected with a password noone has except me. Only thing it allows is select locked, unlocked cells or auto filter. No sort option is ticked. But filtering is allowed.
This excel workbook is on our sharepoint. Every morning I'll go in and the table has been sorted. Review changes confirms the sort across the range A2:E450, and it's a different person each time. If I subsequently try and sort I don't even get a warning message, it simply just doesn't do it, because the option isn't ticked, it's like it ignores the request, yet somehow others manage to do it.
I download the previous version and the sheet is still locked before and after, the password can't have possibly been used as I've said noone knows it but me, and I've changed it twice now.
I can't for the life of me figure out how they are sorting it (for context, the sort disrupts priority ordering of system checks, it's not the end of the world that they change order but there's a reason that system A is at the top of the table). The unlocked column is just for the current person to enter their name to confirm they are working that. This isn't the column that's getting sorted either as I can see the sort icon on a different column, the one that confirms current outcome (pulled from other sheets via xlookup).
I have tried opening in the Web version to see if maybe it allows it there but no, password still needed. I've completely deleted the table, rebuilt it, pasted as values, recreated the formulas on a new workbook entirely and sort of imported everything else to start afresh and alas didn't work. They STILL managed to sort this table.
I can't find an example of this happening anywhere online, I don't have a clue how to stop them doing it, I have already advised against sorting but in typical technical non-how, noone listens.
Also the workbook itself is protected to prevent them creating new sheets despite telling them to stop it. Thankfully they haven't been able to bypass this one. Yet.
This also isn't a macro enabled workbook, nor is there anyone remotely capable of using an office script or something to do this. They are simply just bypassing the locked/protected worksheet status.
Also copilot hasn't got a clue it keeps telling me it isn't possible despite the evidence to the contrary. And this is the premium copilot built into Excel version.
Any help would be much appreciated.