Topic
How to get the Display Name instead of the Login ID for the "Manager" property using "userProfileLookup" runtime in Nintex Form for Office 365
Instructions
Use the following runtime function:
userProfileLookup(replace(userProfileLookup("Employee Email", "Manager"), "i:0#.f\|membership\|", ""), "PreferredName")
userProfileLookup(replace(userProfileLookup("Employee Email", "Manager"), "i:0#.f\|membership\|", ""), "PreferredName")