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I am planning on deploying two Windows 2008R2 PKIs: One for legacy devices that don't support SHA-2 / ECP and another one that does support it.

When the time comes to decommission the SHA1 environment I want to have the CRL next update be the last one ever published.

How do I configure this correctly in a Windows based CA?

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up vote 1 down vote accepted

The Microsoft PKI blog has an extensive set of instructions for decommissioning a PKI tree, more is involved than just setting next update to null

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