The person will use this name to sign in. For most users, it will also be their email address. Each user must have a unique ...

The person will use this name to sign in. For most users, it will also be their email address. Each user must have a unique user name. Names can include letters from the basic Latin alphabet, numbers, periods, and hyphens. It's best to have names that are easy for people to remember. For small organizations, we recommend using just a first name, a first name and last initial, or a first initial and last name.