Problems with RPC over HTTP Outlook 2003/Exchange 2003

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Chuck Lavin

Hi

I have an Exchange 2003 server (over Windows Server 2003 Standard) and

Windows XP clients running Outlook 2003. Everything is at its latest

release.

I have several of these PCs set up for remote access to Exchange through

Outlook using RPC over HTTP. Up until recently, this setup was working fine.

Now these remote PCs are unable to connect to the Exchange server using RPC

over HTTP. As far as I know and as far as I've been able to check, nothing

has been changed on either the server or the clients to cause this sudden

problem. But the only way these outside PCs can connect to Exchange now is

if they open a VPN connection to the network first.

If I run outlook /rpcdiag from a remote PC, the Exchange Server Connection

Status immediately shows an established connection of type Directory to the

server via HTTPS. Subsequent attempts to open connections of type Mail to

the mail server do not complete and are removed from the status screen.

Outlook opens and shows its status as Disconnected.

After I open a VPN connection, the status screen immediately shows the

Directory connection via HTTPS and the Mail connections via TCP/IP. Outlook

shows its status as Connected and everything works (slowly).

All these users can access OWA from these affected PCs without a problem.

This was apparently going on for several weeks before the problem was

reported to me, which makes it really difficult to pinpoint an event that

might have sparked this. Users had been getting around the problem by

opening VPN connections to the server first.

How do I fix this?

Thanks,

CL
 
S

Sembee [MVP]

There are three reasons why this feature fails.

1. Registry settings.

2. SSL certificate.

3. Authentication mismatch.

It isn't the third option as you are getting partial connection.

It sounds to me like the registry settings aren't correct, and I would be checking them again.

You could also use a test account through the Microsoft test site at http://exrca.com/ and see what that flags.

Simon.

Simon Butler, Exchange MVP
Blog | Exchange Resources
 
E

Evan Liu

Hi Chuck,

Any updates on this issue?

Do you follow Simon"s suggestion to troubleshoot the problem? If you have done the test(Outlook Anywhere)at http://exrca.com/, please paste the result in your next post.

Here are some related articles for you, hope it helps:

How to troubleshoot connectivity issues that are caused by RPC client protocol registry entries

http://support.microsoft.com/?id=325930

How to Verify That SSL Certificate Is Installed on RPC Proxy Server

http://technet.microsoft.com/en-us/library/aa997449(EXCHG.65).aspx

Troubleshooting RPC over HTTP Communications

http://technet.microsoft.com/en-us/library/bb124649(EXCHG.65).aspx

How to use the RPC Ping utility to troubleshoot connectivity issues with the Exchange over the Internet feature in Outlook 2007 and in Outlook 2003

http://support.microsoft.com/kb/831051/en-us

If the problem persists, please feel free to let me know and I will be glad to help.

Thanks,

Evan
 
C

Chuck Lavin

AFAIK, exrca.com cannot be used to test Exchange servers when they are using their own self-signed certificates.

Thanks

CL

" Evan Liu" <=?utf-8?B?RXZhbiBMaXU=?=> wrote in message news:5d41e463-a1fc-4549-9722-559f7ade6646...

Hi Chuck,

Any updates on this issue?

Do you follow Simon's suggestion to troubleshoot the problem? If you have done the test(Outlook Anywhere)at http://exrca.com/, please paste the result in your next post.

Here are some related articles for you, hope it helps:

How to troubleshoot connectivity issues that are caused by RPC client protocol registry entries

http://support.microsoft.com/?id=325930

How to Verify That SSL Certificate Is Installed on RPC Proxy Server

http://technet.microsoft.com/en-us/library/aa997449(EXCHG.65).aspx

Troubleshooting RPC over HTTP Communications

http://technet.microsoft.com/en-us/library/bb124649(EXCHG.65).aspx

How to use the RPC Ping utility to troubleshoot connectivity issues with the Exchange over the Internet feature in Outlook 2007 and in Outlook 2003

http://support.microsoft.com/kb/831051/en-us

If the problem persists, please feel free to let me know and I will be glad to help.

Thanks,

Evan
 
E

Evan Liu

Hi Chuck,

Yes, if you use own self-signed certificates, you cannot do the test (Outlook Anywhere) at http://exrca.com. as you cannot do the test at http://exrca.com , I suggest you attempt the following steps to troubleshoot the issue;

1. Please ensure you have right configured RPC over HTTP on the clients. You can follow this link to right configure RPC over HTTP on Outlook 2003 clients:
How to Create an Outlook Profile for Users to Use with RPC over HTTP
http://technet.microsoft.com/en-us/library/aa996069(EXCHG.65).aspx

2. As you use self-signed certificate, you will need to add the CA to the list of trusted CA"s on the server and all clients.

3. Make sure the correct authentication methods are configured on the Web Sites| Default Web Site| RPC.

If the problem persists after you do the steps above, please help me to collect the following information at your convenience:
1. Does this issue occur to all the remote PCs or several of them?

2. Do you get any error when you try to use RPC over HTTP? If so, please paste the error in your next post.

3. Please check the event log. If there is any error, please paste here in your next post.

4. You can use RPC Ping utility to troubleshoot connectivity issues with the Exchange over the Internet feature in Outlook 2003, and show me the result of your test.

How to use the RPC Ping utility to troubleshoot connectivity issues with the Exchange over the Internet feature in Outlook 2007 and in Outlook 2003

http://support.microsoft.com/kb/831051/en-us

For you reference:

Troubleshooting RPC over HTTP Communications

http://technet.microsoft.com/en-us/library/bb124649(EXCHG.65).aspx

How to troubleshoot connectivity issues that are caused by RPC client protocol registry entries

http://support.microsoft.com/?id=325930

If the problem still exists, please help me to collect the information at your convenience, with the information, we can help you more efficiently.

Thanks,

Evan
 
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