Description: When trying to rollup database to rollup core getting error: The database link is invalid
1. Make sure database link is created correctly. See Article: http://community.landesk.com/support/docs/DOC-1097 (This does say for 8.7, but it hasn't changed so use this article)
2. If using a port other than 1433 then in your datasource type in childdatabasesqlservername, port
3. If IndexAccessPath is enabled you will need to disable it by doing the following:
a. Connect to <SQL Server Name>
b. Expand Server Objects > Linked Servers > Providers
c. Rick click on SQLNCLI and select properties
d. You will see this dialog. Make sure 'Index as access path' is unchecked.