XCCC: Event ID 12290: Could Not Locate a Machine Certificate in the Store (281154)

RESOLUTION

An administrator must manually request a computer certificate, which will be used for secure conferencing. The following steps outline the proper procedure needed to resolve this issue.

Active Directory Users and Computers MMC Snap-In

1. Click the domain object, and then right-click Properties.
2. Click the Group Policy tab, and then click Edit.
3. Expand the Computer Configuration object, and locate the following object:

   Windows Settings\Security Settings\Public Key Policies\Automatic Certificate Request

4. Right-click the object, click New, and then click Automatic Certificate Request.
5. Click the Computer object, and then click Next.
6. Click the appropriate Certificate Authority (CA), click Next, and then click Finish.
7. Verify that the certificate enrollment object actually showed up.

NOTE: The preceding steps assume that the T.120 MCU computer is a member of the Domain Computers group. If not, you must follow the procedures outlined in the following Microsoft Knowledge Base article, which explains how to add your conferencing server to the Domain Computers group, whether it is in the same domain as the Certificate Authority or in a child domain: