sys.login_token (Transact-SQL)

Returns one row for every server principal that is part of the login token.

Column name	Data type	Description
principal_id	int	ID of the principal. This value is unique within server.
sid	varbinary(85)	Security identifier of the principal. If this is a Windows principal, sid = Windows SID. If the login is mapped to a certificate, sid = GUID from the certificate.
name	nvarchar(128)	Name of the principal. This value is unique within server.
type	nvarchar(128)	Description of principal type. All types are mapped to sid. The value can be one of the following: SQL LOGIN WINDOWS LOGIN WINDOWS GROUP SERVER ROLE LOGIN MAPPED TO CERTIFICATE LOGIN MAPPED TO ASYMMETRIC KEY CERTIFICATE ASYMMETRIC KEY
usage	nvarchar(128)	Indicates the principal participates in the evaluation of GRANT or DENY permissions, or serves as an authenticator. This value can be one of the following: GRANT OR DENY DENY ONLY AUTHENTICATOR

Change History

Release	History
12 December 2006	Changed content: Added note about mapping type to sid.
17 July 2006	Changed content: Corrected names of principals. Corrected details of principals' significance in permissions evaluation.
5 December 2005	Changed content: Changed column name sid_id to sid. Corrected the size of the nvarchar columns.