I have a column that is full of user IDs and i need to add @contoso.com to the end of each of these user IDs. What excel function can i use to make this happen? So I column named SamAccountName with user IDs that are for example 9991111 and 9991112. The coloumn has 100s of user ids and i want to add @contoso.com to the end of all those IDs. Some are numbers and others are alphabetical like "JDoe". Its a CSV File.