troubleshooting Question

RPC over HTTPS not working

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vinsenapatiFlag for United Kingdom of Great Britain and Northern Ireland asked on
ExchangeMicrosoft Server Apps
2 Comments2 Solutions551 ViewsLast Modified:

Im configuring RPC over HTTPS but it is not getting through. Basically I have done the following:

1. This is a single Exchange Server scenario
2. Got a certificate from a third party
3. Installed it on Exchange
4. Got OWA enabled with https and thats working fine
5. RPC components is installed on my Exchange server
6. Configuration on Exchange is as per the book
Registry Settings for RPC/HTTP:
Global Catalog (GC) Sever:
1. Check the following registry key on the GC and make sure that it is in place:
- HKLM\System\CurrentControlSet\Services\NTDS\Parameters
  -- Type: REG_MULTI_SZ
  -- Name: NSPI interface protocol sequences
  -- Value: ncacn_http:6004
2. GC has been rebooted once this key was put.

Exchange Mailbox Server:
Verify the following registry keys if all the ports got added by Exchange automatically:
- HKLM\System\CurrentControlSet\Services\MSExchangeIS\ParametersSystem
  -- Type: REG_DWORD
  -- Name: Rpc/HTTP Port
  -- Value: 0x1771 (Decimal: 6001)

- HKLM\System\CurrentControlSet\Services\MSExchangeSA\Parameters
  -- Type: REG_DWORD
  -- Name: Rpc/HTTP NSPI Port
  -- Value: 0x1774 (Decimal: 6004)

- HKLM\System\CurrentControlSet\Services\MSExchangeSA\Parameters
  -- Type: REG_DWORD
  -- Name: HTTP Port
  -- Value: 0x1772 (Decimal: 6002)

Configure ValidPorts registry key:

- HKLM\Software\Microsoft\RPC\RPCProxy
  -- Type: REG_MULTI_SZ
  -- Name: ValidPorts
  -- Value:
MailboxServer_Netbios:6001-6002;MailboxServer_FQDN:6001-6002; MailboxServer_Netbios:6004;MailboxServer_FQDN:6004;
Host file entry is done on Exchange Server
I have a allow rule on ISA server that permits traffic from the public IP

After all this I did a test at and it fails while connecting to exchange information store. Test results are attached.

This thing has picked my brains now. Can anyone help please
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