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Migrating CA from Windows 2003R2 to Windows 2012R2 ends with "a signature algorithm or public key length does not meet the system's minimum required strength"

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Hi all,

I've followed this documented procedure to migrate my standalone root CA from a Windows Server 2003R2 to Windows Server 2012R2:

http://technet.microsoft.com/en-us/library/dn486805.aspx

In the article there is no mention about public key length but, at the end of the procedures when I try to start the new CA I got the error "a signature algorithm or public key length does not meet the system's minimum required strength".

my old CA has a 512bit key length, I guess Windows 2012R2 does not support anything less then 1024 bit, so I cannot migrate? I think that if I change my CA's certificate I've to reconfigure a lot of things in my AD...


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