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01-04-2021

DE

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Missing EK cert in TPM chip

2021-01-04, 13:07 PM

Hello,

 

we want to use of Microsoft Intune the feature AutoPilot to provision our laptops.

 

For AutoPilot to work the TPM chip needs an EK cert.

Sadly this certificate seems to be missing initial on L14 devices.

 

This is the error code:

It seems to be that Windows has a problem with EK cert of the TPM

Bits:  0x0000000000000002

  -NoValidEkCert: No valid EK cert found

 

It seems that usually a device gets the certificate dynamically after a while due to a windows task or the hardware uses the connection to download it.

A firmware upgrade does not include the certificate for the TPM chip.

 

Does somebody know how we can force that the EK cert is available in the TPM chip?

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6639 Posts

10-29-2009

NC

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Re:Missing EK cert in TPM chip

2021-01-05, 15:35 PM

My understanding is that the TPM auto-provisioning task of Windows 10 itself is responsible to get this certificate.  If this is not working for some reason, I think you will need to ask Microsoft to know the reason why.  This article is written by Microsoft engineer, see if it helps you:  https://oofhours.com/2019/07/09/tpm-attestation-what-can-possibly-go-wrong/

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45 Posts

09-15-2016

US

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Re:Missing EK cert in TPM chip

2021-01-07, 15:16 PM

Do you have any firewalls in place?  When we were trying to get Autopilot working we would run into the same error.  Turned out that the specific URL that the computer needed to get to for the cert was being blocked.

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