Article ID: 950138 - View products that this article applies to.
When you use the Outlook Anywhere feature to connect to an Exchange Server 2007 Service Pack 1–based server that is running Windows Server 2008, you are prompted for your credentials three times. Additionally, you may receive the following error message:
The connection to Microsoft Exchange is unavailable. Microsoft Outlook must be online or connected to complete this action.
Windows Server 2008 prefers to use IPv6 protocol instead of the IPv4 protocol. The Exchange 2007 server does not listen to some specific ports on IPv6 that are used for Outlook Anywhere. Therefore, this problem occurs.
To resolve this problem, download Update Rollup 4 for Exchange Server 2007 Service Pack 1. Then, install the update on the Exchange server. For more information about Update Rollup 4 for Exchange Server 2007 Service Pack 1, see the following Exchange Help topic:
Description of Update Rollup 4 for Exchange Server 2007 Service Pack 1For more information about how to obtain the latest Exchange service pack or update rollup, see the following Exchange Help topic:
How to Obtain the Latest Service Pack or Update Rollup for Exchange 2007
For more information about Outlook Anywhere, visit the following Microsoft Web site:
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Article ID: 950138 - Last Review: October 7, 2008 - Revision: 3.1