Error 6002 6004 RPC over HTTPS Outlook


I've some problems to get Outlook over HTTPS work. I've did the following thinks:

- Install RPC-proxy
- add a registry key 6001-6002 + 6004 for netbios, internal domain, external domain
- add 6001, 6002, 6004 in my router NAT
- I've a SAN certificate

Internal I can telnet port 6001, 6002, 6004 on the netbios name or ip-adres.
External I can online telnet port 6001.

What is the problem?

Kind regards,

Who is Participating?
MAS (MVE)EE Solution GuideCommented:
can you telnet x.x.x.x 443  from outside?

Please check your configuration using this
Telling us the version of Exchange server you are using would help. I'm guessing it is Exchange 2003.
To troubleshoot on it pleas look at this article:

For You don't need any other open port than 443.
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prinsbjAuthor Commented:
I can connect on port 443.

The version of Exchange is 2003 with SP 2 on a Windows Server 2003 with also SP2.

When I test with I get also the error with 6004.

MAS (MVE)EE Solution GuideCommented:
prinsbjAuthor Commented:
When I try to do a rpcdump /p ncacn_http I get a error:

RpcMgmtEpEltInqNext: Access denied

rpcdump failed after 1 second
The article below describe on  
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;en-us;831051#XSLTH3135121122120121120120
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