Hi, i had the same problem and i fix it whith this article
For all Configuration Manager releasesInstall the certificate file available in this hotfix KB3060648 to manually renew the Asset Intelligence certificate. To do this, follow these steps:
Go to the "Hotfix Download Available" section at the top of this Knowledge Base article to download the hotfix package named ConfigMgrAICert-KB3060648.exe. Double-click the hotfix package to open the Microsoft Self-Extractor dialog box, click Yes to accept the License Agreement, select a location for the extracted files, and click OK to continue and unzip the files. Run the ConfigMgrAICert-KB3060648.exe file to extract the 8EBC7D60-4ACA-07F2-7004-A799B2C2B096.pfx certificate file to a location that can be accessed by the site server. In the Configuration Manager console, find the computer name of the Asset Intelligence synchronization point server in the following location: For System Center Configuration Manager 2007 System Center Configuration Manager\Site Database (site code, site name)\Site Settings\Site Systems For all System Center 2012 Configuration Manager products … Administration\Overview\Site Configuration\Servers and Site System Roles Right-click the Asset Intelligence synchronization point, and then click Properties. Click the General tab, specify the path of the certificate file, and then click OK.
Note You do not have to reset the System Center Online Point server role or restart the AI_UPDATE_SERVICE_POINT service after you re-enable the Asset Intelligence synchronization point by using the new certificate. You only have to perform the synchronization again.
https://support.microsoft.com/en-us/kb/3060648
Regards.