We're running a SQL Server 2000 instance with users tied to Windows accounts. Many of the usernames have spaces in them and that is causing us some problems now. We would like to be able to rename them to get the spaces out, but I'm unable to figure out how this is done. I would love some help on this.
The 2nd bit will fix your issue with implied schema. This happens if don't qualify schema (eg dbo) because SQL Server 2000 has pretty much no user-schema separation like later versions
Note: you can't rename users in SQL Server 2000 IIRC: need to run sp_revokedbaccess then sp_grantdbaccess. If you own objects because of your implied schema then you'll need sp_changeobjectowner. I think SQL EM will prompt you.
That is, you should always qualify schema in SQL Server.
Then no need to change the users