I know I’ve covered this somewhere before – but this is just a reminder post for my own reference. When I was building my lab on vSphere 5.1 I had to configure a 32-bit DSN for VMware Update Manager- this link provides details on how to do it. I believe this is no longer necessary with 5.5. Again, not very exciting, but useful to know how to do it. Also, statements like “You can install the Update Manager server only on 64bit machines. However, Update Manager is a 32bit application and requires a 32bit DSN” still blow my mind.