32-bit & 64-bit BizTalk Servers in the same BizTalk Group?

A customer is looking to scale-out their current BizTalk Group by adding additional processing nodes. The current nodes are 32-bit only and I’m keen to have them move to 64-bit for the new servers, with the older 32-bit servers being phased out in due course.

Does anyone know whether 32-bit and 64-bit servers can live alongside each other in the same BizTalk Group? I know that you can run 32-bit Host Instances on a 64-bit install so I can’t see that there will be a problem, but….

If anyone has any advice on this, please leave a comment.

Cheers, Nick.