Re: RPC over HTTP for Outlook
- From: v-natliu@xxxxxxxxxxxxxxxxxxxx ("Nathan Liu [MSFT]")
- Date: Thu, 17 Nov 2005 08:26:55 GMT
Hello Direct,
Thank you for posting in the SBS newsgroup.
Also, many thanks for Jerz's input.
To narrow down this issue, please refer to the following questions and
steps:
1. I think this problem can occur if you are using NTLM authentication to
the proxy server for Exchange, but Windows does not automatically send the
NTLM challenge/response data. Windows does not do this because the older
LANMAN challenge/response password is included in the authentication data.
If this is the case, let''s try the following steps to see if it works:
- Make sure Outlook is using NTLM for authentication in the Exchange Proxy
Settings page.
- After that, click Start, and then click Run.
- In the Open box, type regedit, and then press ENTER.
- In Registry Editor, locate the following subkey in the registry:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa\
- In the right pane, double-click LmCompatibilityLevel.
- In the Value data box, type a value higher than 2 that is appropriate for
your environment, and then press ENTER.
- Quit Registry Editor.
- Repeat the above steps to add the registry key on Outlook 2003 computer,
RPC Proxy server and the Exchange server 2003.
For more information, please refer to the following Knowledge Base Article:
You Must Provide Windows Account Credentials When You Connect to Exchange
Server 2003 With Outlook Over HTTP
http://support.microsoft.com/default.aspx?scid=KB;[LN];820281
Note: It may apply to your scenario as well.
2. Please also refer to the following information to troubleshoot this
issue:
833401 How to configure RPC over HTTP on a single server in Exchange Server
2003
http://support.microsoft.com/?id=833401
How to use the RPC Ping utility to troubleshoot connectivity issues with
the Exchange over the Internet feature in Outlook 2003
http://support.microsoft.com/kb/831051
827330 How to troubleshoot client RPC over HTTP connection issues in Office
http://support.microsoft.com/?id=827330
I appreciate your time and cooperation. If anything is unclear, please feel
free to let me know. I am looking forward to hearing from you.
Best regards,
Nathan Liu (MSFT)
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--------------------
>Thread-Topic: RPC over HTTP for Outlook
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<uAkpX4k6FHA.2524@xxxxxxxxxxxxxxxxxxxx>
>Subject: Re: RPC over HTTP for Outlook
>Date: Tue, 15 Nov 2005 17:47:04 -0800
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>
>Thanks for the Reply. Yes I that is how I am doing the username and
>password. It works when I have VPN but when using from Internet it just
keeps
>asking for username and password and have tried various formats even same
>foramt that works when using the VPN
>
>
>--
>Direct Link
>www.dlhelp.com
>
>
>"Jerz" wrote:
>
>>
>> "Direct Link" <DirectLink@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
>> news:945B0D26-0060-4DC0-B37F-538141EAB162@xxxxxxxxxxxxxxxx
>> > Has anyone succesfully used RPC via HTTP for Outlook outside the
Firewall?
>>
>> YES.
>>
>>
>> >
>> > I can get to work when VPN is in place but as soon as I try without
that
>> > no
>> > luck. It appears to be a username and password login issue like it is
not
>> > accepting it.
>>
>> Are you using "domainname\username" to log in?
>>
>> Did you setup the outlook client to use http to retriev emaail from
>> exchange?
>>
>>
>> Jerz
>> >
>> > If anyone has any suggestions please let me know. Maybe I am missing a
>> > port? Using 80 and 443 to Be Open and Installed the SSl cert on the
>> > client.
>> >
>> > OWA works fine and no longer prompts for Cert
>> >
>> > Any ideas?
>> >
>> > Have had same problem at multiple clients so i must be missing
something
>> > --
>> > Direct Link
>> > www.dlhelp.com
>>
>>
>>
>
.
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