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Remote access certificate authentication: moving from sha-1 to sha-2

We have an ASA5520 supporting remote access clients using anyconnect; currently the environment is leveraging certificates using the sha-1 hash.      Our CA will no longer be deploying certificates with sha-1 and new users will be getting certificates with sha-2.  My question is in regard to migrating to the use of new certificates using sha-2.

Will we need to deploy new certificates on the ASA and/or legacy clients, or will we be able to support clients with both hashes with no change?

Any information you can offer will be appreciated.

Per

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