UAG – Automatic certificate enrollment failed

The following is applying to TMG too.

If you have an internal certificate authority and a GPO which enables automatic certificate enrollment, you may have the following event logged on the Application event log:

Event ID: 6

Source: CertificateServiceClient-Autoenrollment

Description: Automatic certificate enrollment for local system failed (0x800706ba). The RPC server is unavailable.

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To solve this issue, you have to open the TMG Management console (even for UAG), right click on Firewall Policy and choose Edit system policy (All tasks\System Policy)

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Disable Enforce strict RPC compliance (available at Authentication Services\Active Directory)

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