Hi Anil Thomas,

There is indeed an expression you can use using NOT logic. Unfortunately this expression is rather obnoxious, but the following will exclude anyone with an employeeNumber that includes a letter and/or is blank:

!(String.stringContains(user.employeeNumber,"A") or String.stringContains(user.employeeNumber,"B") or String.stringContains(user.employeeNumber,"C") or String.stringContains(user.employeeNumber,"D") or String.stringContains(user.employeeNumber,"E") or String.stringContains(user.employeeNumber,"F") or String.stringContains(user.employeeNumber,"G") or String.stringContains(user.employeeNumber,"H") or String.stringContains(user.employeeNumber,"I") or String.stringContains(user.employeeNumber,"J") or String.stringContains(user.employeeNumber,"K") or String.stringContains(user.employeeNumber,"L") or String.stringContains(user.employeeNumber,"M") or String.stringContains(user.employeeNumber,"N") or String.stringContains(user.employeeNumber,"O") or String.stringContains(user.employeeNumber,"P") or String.stringContains(user.employeeNumber,"Q") or String.stringContains(user.employeeNumber,"R") or String.stringContains(user.employeeNumber,"S") or String.stringContains(user.employeeNumber,"T")  or String.stringContains(user.employeeNumber,"U") or String.stringContains(user.employeeNumber,"V") or String.stringContains(user.employeeNumber,"W") or String.stringContains(user.employeeNumber,"X") or String.stringContains(user.employeeNumber,"Y") or String.stringContains(user.employeeNumber,"Z")) and String.len(user.employeeNumber) != 0

Note that you'd want to replace user.employeeNumber with whatever your attribute's variable name is.

Thanks,

Brian Anderson

KCS Specialist

Okta