After you move the databases, and run the utility to point Sage 100 to the new SQL Instance, you may get permission errors. If so, run these commands in SQL (for each of the MAS_ databases... including system):
`use MAS_###;
exec sp_changedbowner 'MAS_User';
exec sp_dropuser 'MAS_Reports';
exec sp_grantdbaccess 'MAS_Reports';
exec sp_addrolemember 'db_datareader', 'MAS_Reports';`