SSIS uses the JET provider under the covers to access earlier versions of Excel and Access. That is what happens when you use the Excel connection manager, which is a wrapper around JET provider. By the same token, connectivity to Access is also currently wrapped around JET, and offered by a special user interface in SSIS.
If you are dealing with Office 2007, you must use the new ACE provider, please see the page on Office 2007. There's also a step by step instruction on how to use Excel.
By
Name
Data Access API
Supported Excel Versions
64 bit
Metadata support
Provider Notes
FAQ
Microsoft
Excel Source
Excel ISAM Driver
ALL
Interactive Edge
DataDefractor
Direct BIFF Read
yes
Worksheets, PivotTables
See website
Naomi N edited Revision 5. Comment: Not much info