No FreeBusy information returned for Exchange user

Busy search fails to show appointments for some Exchange users when a GroupWise user preforms a busy search.
The gateway log shows No FreeBusy information

Snip of a GateWay Log

05-15-09 15:42:22 2  Message 1: GWOUT: Processing Busy Search
05-15-09 15:42:22 2  Message 1: Filename-0a0d8d59.KB0  FileSize- 1.7KB
05-15-09 15:42:22 2  Message 1: Message ID-4A0DE277.FC1:188:38036
05-15-09 15:42:22 2  Message 1: From: domain.po.user
05-15-09 15:42:22 2  Message 1: No FreeBusy information
05-15-09 15:42:22 2  Message 1: TO (Active): First Organization.First Administers
                  tive Group.is messed alias Completed
05-15-09 15:42:22 2  Message 1: TO (Active): First Organization.First Administers
                  tive Group.nomess Completed
05-15-09 15:42:22 2  Message 1: Busy Search: Completed

This issue has been reported do development.  The resolution for this issue has not yet been reached however it appears to be an issue with the alias on the Exchange account.

The issue can be duplicated when creating an Exchange user and changing the default Alias during the creation.