Exchange 12 Will Be 64-Bit Only (2005)

On November 15, Microsoft announced that Exchange 12, due in late 2006 or early 2007, will only run on 64-bit servers.

By way of background:

  • With 32-bit machines, you only get a 4GB memory space.
  • Servers can easily run out of space; e.g., Windows can take 1GB of this.
  • Over the next two years, 64-bit servers will be mainstream.

Key points are:

  • Clients don't need to be 64-bit.
  • AMD and Intel chips are supported.
  • Will allow servers to scale beyond their current practical maximum of 4,000 to 5,000 users.
  • Should reduce cost per user of storage.
  • Exchange 12 and earlier servers can coexist.
  • Some third-party 32-bit applications won't work with Exchange 12. Software vendors should work with Microsoft to resolve the issues.
  • Beta 1 is available now.
  • The first public beta will be in mid-2006.

64-bit support makes great sense and is good for everyone.

... David Ferris

One Comment


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