select *   FROM fn_listextendedproperty (NULL, NULL, NULL, NULL, NULL, NULL, NULL);
select * from sys.extended_properties

EXEC sp_dropextendedproperty 
     @name = 'MS_Description' 
    ,@level0type = 'schema' 
    ,@level0name = dbo
    ,@level1type = 'table'
    ,@level1name = 'DataDelphier'
    ,@level2type = 'column'
    ,@level2name = Email;
GO

EXEC sp_addextendedproperty 
@name = N'MS_Description',
@value = 'Eko Indriyawan Cakep Sekali',
@level0type = N'Schema',
@level0name = dbo,
@level1type = N'Table',
@level1name = DataDelphier, 
@level2type = N'Column',
@level2name = Email;

GO

select * from sys.extended_properties

GO