Yes, we have a number of SQL servers that we are registered under different server groups . We tried upgrading on a test machine and we lost all the server registrations we had registered and there logon information. This is also true if we do a fresh installation of SQL Server 2000 that is does not retain the registrations under SQL Server 7.0. But when we did installation of just Client components of SQL 2000 it did retain the Groups but still not the servers. So we have to individually register all the sql servers again. But there is no issue with existing views, tables or stored procedures as Jef's concern. As fas as upgrade from SQL 7.0 to SQL 2000 is concerned, its a known issue that the SQL profiler traces & server registrations will not be restored to the new system.