Unable to upgrade EmailAddressPolicy

Hi,

while migrating a Exchange 2003 to 2010 I tried upgrading the Default Email Address Policy with

Set-EmailAddressPolicy "Default Policy" -IncludedRecipients AllRecipients

But this fails with 7157D1AB,Microsoft.Exchange.Management.SystemConfigurationTasks.SetEmailAddressPolicy

The Default Policy has Version 0.0 (6.5.6500.0).

Any hints on how I can upgrade the Default Policy to the new version?

Regards,

Tom