Exchange Server 2007 is a native 64-bit application that includes 64-bit management tools. You can use the management tools to administer your Exchange Server environment remotely. If the remote computer is running a 32-bit operating system, you will need to download the 32-bit management tools.

Download Link:

https://www.microsoft.com/downloads/details.aspx?FamilyID=6be38633-7248-4532-929b-76e9c677e802&DisplayLang=en