No estoy seguro de si hay una forma integrada, pero pruebe esta consulta para los principales del servidor:
;with ServerPermsAndRoles as
(
select
spr.name as principal_name,
spr.type_desc as principal_type,
spm.permission_name collate SQL_Latin1_General_CP1_CI_AS as security_entity,
'permission' as security_type,
spm.state_desc
from sys.server_principals spr
inner join sys.server_permissions spm
on spr.principal_id = spm.grantee_principal_id
where spr.type in ('s', 'u')
union all
select
sp.name as principal_name,
sp.type_desc as principal_type,
spr.name as security_entity,
'role membership' as security_type,
null as state_desc
from sys.server_principals sp
inner join sys.server_role_members srm
on sp.principal_id = srm.member_principal_id
inner join sys.server_principals spr
on srm.role_principal_id = spr.principal_id
where sp.type in ('s', 'u')
)
select *
from ServerPermsAndRoles
order by principal_name
Básicamente, lo que hace es obtener los permisos otorgados y denegados, y los une con el rol de miembro. Debería darle una breve mirada sobre la seguridad para los inicios de sesión del servidor. Avísame si eso es lo que estás buscando.