Pamela Mooney shows how you can find three-part or four-part naming on a SQL Server instance:
The script below searches the metadata for views, sprocs and functions for occurrences of 3 and 4 part names. Three-part names consist of databasename.schemaname.objectname, and four-part names consist of servername.databasename.schemaname.objectname. Because the code searches metadata, it isn’t always perfect. If your comments mention a servername followed by a period, for example, it will be caught. Nevertheless, it’s a great place to begin looking, and a real help in getting rid of problems before they really bite you.
Click through for the script.