Filter and/or sort a combo box items

[Brian_]

I'd like to be able to filter and sort my combo box values. I've been able to filter and sort a dropdown list using this method;

Sort(Filter(Employees,IsBlank(TermDate)),FullName)

but for some reason it doesn't work for a combobox. Am I missing something or is this just not supported? I found someone else trying to limit their choices

https://powerusers.microsoft.com/t5/General-Discussion/Filter-Choices-for-Combo-Box/m-p/90894#M34274

and used a filtered collection to do this but that seems a bit cumbersome when a simple filter and sort should work.