the following scenario:
- In a mixed
Exchange Server 2003 and
Microsoft Exchange Server 2007 environment, you have more than one
Administrative Group. The network connections between these Administrative Groups are low in
- Public Folder replication is scheduled among the Administrative Groups.
- An Exchange
Server 2007 user creates
an appointment or a meeting request
in Microsoft Office Outlook 2007. Then, the Exchange Server 2007
Server 2003 user to this appointment or meeting as an
- The Exchange
Server 2003 attendee belongs to a different AG
Server 2007 user.
- The Exchange
Server 2007 user checks the Free/Busy
Office Outlook 2007.
In this scenario, the Exchange
Server 2007 user intermittently cannot access
the Exchange Server 2003 server user's Free/Busy
If a user in an Exchange
Server 2007 Administrative Group requests the Free/Busy information
for a user in an Exchange
Server 2003 Administrative Group, Exchange
Client Access Service (CAS)
Exchange Web Service (EWS) proxy. Therefore, the request may use the
low bandwidth connection to the Exchange
Server 2003 Administrative Group. In this case, the Free/Busy
information may be unavailable intermittently because of
the low network bandwidth.
To resolve this problem, follow these steps:
- Install Update Rollup 2 for Exchange
Server 2007 Service Pack 2 on the Exchange
Description of Update Rollup 2 for Exchange Server Service Pack 2
- Locate the Web.config file in the following folder:
- Open the Web.config file in Notepad, and then locate and
add the following line between the <appsettings> element and the
<add key="UseLocalReplicaForFreeBusy" value="true" />
Note If the value of the key "UseLocalReplicaForFreeBusy" is true,
Server 2007 CAS checks if there is a
replica for the Exchange
Server 2003 users on a local public folder
If there is a replica available, Exchange Server 2007 CAS uses the replica
instead of a low bandwidth WAN connection.
- Save the Web.config file and then restart the Exchange Web
Service on the Exchange Server 2007 server.
- Do the same change in the Web.config file located in:
has confirmed that this is a problem in the Microsoft products that are listed
in the "Applies to" section.
Article ID: 971349 - Last Review: October 9, 2011 - Revision: 2.0
- Microsoft Exchange Server 2007 Service Pack 2, when used with:
- Microsoft Exchange Server 2007 Enterprise Edition
- Microsoft Exchange Server 2007 Standard Edition
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