ConfigMgr Task Sequence Error 0X8004005

I am working on couple of exciting SCCM Projects and still learning something new every day.

 I have been figuring out why SCCM task sequences are not deploying to workstations. Client was showing following error prior to showing option to select task sequence.

 Usually, you receive error 80004005 if time is not set correctly on computer or there is mismatch between SCCM DP/Primary site time and client time.

















In may case issue caused due to SHA1 Certificate chain. Somehow client have not upgraded their certificate authority to Sha2 due to some limitation with one of the applications. SCCM has been configured with SHA1 Certificates.  However, i forgot to untick the box 'Require SHA-256'.As a result , Boot image was failing to communicate with SCCM Management. To fix the issue untick 'Require SHA-256 from \Administration\Overview\Site Configuration\Sites. As shown below.

Happy SCCM....

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