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:
For more information about how to obtain the latest Exchange service pack or update rollup, see the following Exchange Help topic:
For more information about Outlook Anywhere, visit the
following Microsoft Web site:
has confirmed that this is a problem in the Microsoft products that are listed
in the "Applies to" section.