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"HTTP Error 400 Bad Request" error message when you use OWA in Exchange Server 2010 SP1 to receive instant messages by using Internet Explorer 9

SYMPTOMS
Assume that you run Microsoft Office Outlook Web Access (OWA) in Exchange Server 2010 Service Pack 1 (SP1) by using Internet Explorer 9. When someone sends you an instant message, you do not receive a new incoming message pop up as expected. Instead, you receive the following error message:

HTTP Error 400 Bad Request

CAUSE
This issue occurs because Internet Explorer 9 changes the way that the caller path is prepended to the URL. However, OWA does not call the functions that respond to the message.
RESOLUTION
To resolve this issue, install the following update rollup:
2529939 Description of Update Rollup 3 for Exchange Server 2010 Service Pack 1
STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Properties

Article ID: 2457868 - Last Review: 04/06/2011 19:33:00 - Revision: 2.0

Microsoft Exchange Server 2010 Service Pack 1

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