We have Stand alone CA(Server 2012 R2); previously I have generated the certificate without any issue. but now I am receiving below error.I am requesting the certificate from the same CA server.

Troubleshooting steps performed

1)Checked permission

2) Restarted the all certificates services/IIS server services

3)Restarted the CA server.

After all no luck..please help me out

Your request failed. An error occurred while the server was processing your request.

Contact your administrator for further assistance.

• Edited by sandeep patil IT Professional Tuesday, March 24, 2015 9:59 AM
• Moved by Amy Wang_Microsoft contingent staff, Moderator Wednesday, March 25, 2015 2:10 AM Certificate related from Windows Server Manager forum

Hi Sandeep,

I am requesting the certificate from the same CA server.

Do you mean that you are requesting certificate from the CA itself?

Are you trying to request certificate through MMC?

I suggest you check whether the CAs A (host) record is present in corresponding DNS zone.

More information for you:

CCertRequest::Submit: The RPC server is unavailable. 0x800706ba (WIN32: 1722)

https://social.technet.microsoft.com/Forums/windowsserver/en-US/eb9bcabc-f770-4e88-b4a8-1fa6cead5a00/ccertrequestsubmit-the-rpc-server-is-unavailable-0x800706ba-win32-1722?forum=winserverDS

Problem with ADCS Web Enrollment

https://social.technet.microsoft.com/Forums/windowsserver/en-US/361e4784-770b-4ac7-93ef-a8260d95fa6c/problem-with-adcs-web-enrollment?forum=winserversecurity

Best Regards,

Hi,

I am requesting the certificate via web browser.It's a Standalone CA.

Previously I created and issued the certificates for some of the server but now while submitting the new certificate request it's giving error.In event log also not giving any error.

Hi Sandeep,

Here are a few suggestions for you:

1. Log onto the CA, check whether Remote Procedure Call services (including RPC and RPCLocator services) are running, if not, start them manually.
2. Ensure ports TCP 135 and randomly allocated high TCP ports are not blocked, or you may temporarily disable firewall on the CA to test.

More information for you:

Service overview and network port requirements for Windows

http://support.microsoft.com/en-us/kb/832017#method4

Best Regards,

Amy