Outlook 2007 Cannot Authenticate

[Manny]

I have a remote user on Windows XP and Outlook 2007. We configured his
Outlook profile to connect to my Exchange 2003 server for RPC over HTTP. We
cannot get it to authenticate and get the following error message: "The
connection to Microsoft Exchange is unavailable. Outlook must be online or
connected to complete this action."

His computer is NOT part of the network domain. However, he does VPN into
our corporate network and he can ping my mail servers as well as my domain
controllers.

NOTE: This is the first satellite user I have had on Office 2007. All my
other satellite users are on XP and Office 2003...All are fine and never had
issues authenticating and connection to my Exchanger server via RPC over HTTP.

Thanks for the help.

Manny

 

[Diane Poremsky [MVP]]

So he's using VPN and RPC over HTTP? Does everyone use RPC over HTTP over
VPN?

Typically, the VPN connection takes all traffic so the servers and paths
used by Outlook need to be routable from inside the network. If everyone
VPNs and it works, then the paths are probably routable. Outlook needs ot be
set to use the vpn or any connection.

See http://support.microsoft.com/kb/927481

--
Diane Poremsky [MVP - Outlook]



Outlook Tips by email:
mailto:[email protected]

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[Manny]

Hi. No they do not. We just did this because it was having issues with the
first time authentication. Normally remote users configured for RPC over HTTP
do not use the VPN. In any regards, thanks for the help. We figured out the
issue.

It turns out that Office Updates were not applied. Once applied, it all
worked. This particular user uses a 3rd party consultant for their IT work.
When they could not get it to work, they called me at HQs to resolve the
issue thinking it was with the server. I asked the IT consultant if he
applied all patches/fixes/updates. He told me yes, but upon further review,
he only applied the Windows Updates...but not the Office Updates...hence the
culprit.

Thanks,
Manny

So he's using VPN and RPC over HTTP? Does everyone use RPC over HTTP over
VPN?

Typically, the VPN connection takes all traffic so the servers and paths
used by Outlook need to be routable from inside the network. If everyone
VPNs and it works, then the paths are probably routable. Outlook needs ot be
set to use the vpn or any connection.

See http://support.microsoft.com/kb/927481

--
Diane Poremsky [MVP - Outlook]



Outlook Tips by email:
mailto:[email protected]

EMO - a weekly newsletter about Outlook and Exchange:
mailto:[email protected]

You can access this newsgroup by visiting
http://www.microsoft.com/office/community/en-us/default.mspx or point your
newsreader to msnews.microsoft.com.

I have a remote user on Windows XP and Outlook 2007. We configured his
Outlook profile to connect to my Exchange 2003 server for RPC over HTTP.
We
cannot get it to authenticate and get the following error message: "The
connection to Microsoft Exchange is unavailable. Outlook must be online or
connected to complete this action."

His computer is NOT part of the network domain. However, he does VPN into
our corporate network and he can ping my mail servers as well as my domain
controllers.

NOTE: This is the first satellite user I have had on Office 2007. All my
other satellite users are on XP and Office 2003...All are fine and never
had
issues authenticating and connection to my Exchanger server via RPC over
HTTP.

Thanks for the help.

Manny