The vCenter Server system must have a 64-bit DSN. This requirement applies to all supported databases.

If you use the data migration tool to migrate a SQL Server Express database located on the vCenter Server system to a new system, you do not need to create the 64-bit DSN. The data migration tool creates the DSN as part of the installation process. For other databases that are not bundled with vCenter Server, you must create a 64-bit DSN.


Select Control Panel > Administrative Tools > Data Sources (ODBC).


Use the application to create a system DSN.

If you have a Microsoft SQL database, create the system DSN for the SQL Native Client driver.


Test the connectivity.

The system now has a DSN that is compatible with vCenter Server. When the vCenter Server installer prompts you for a DSN, select the 64-bit DSN.