UserDisplayName

String (90)

On Insert: Yes

On Update: Yes (if UserReferenceSystemId and UserUid is not supplied)

The user display name is a unique identifier for a user

Betty Smith

UserId

Int32

On Insert: No

On Update: No

The user Id is a unique identifier for a user. For internal use only.

UserReferenceSystemId

String (20)

On Insert: No

On Update: Yes (if UserDisplayName and UserUid is not supplied)

The user reference system Id / employee Id  is a unique identifier for a user

Partner - 01

UserUid

Int64

On Insert: No

On Update: Yes (if UserDisplayName and UserReferenceSystemId is not supplied)

The user Uid is a unique and immutable identifier for a user

1152921504607011056

EmailAddress

String (100)

On Insert: Yes

On Update: No

The user email address is a unique identifier for a user

betty@revcorp.bb

FirstName

String (20)

On Insert: Yes

On Update: No

The user's first name

Betty

LastName

String (20)

On Insert: Yes

On Update: No

The user's last name

Smith

MiddleName

String (20)

On Insert: Yes

On Update: No

The user's middle name