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We've got an Exchange 2007 server running on Windows Server 2008 in our small domain for internal use only, installed one year ago.

Today the outlook clients started to show a security warning: "the certificate is expired or not yet valid".

As I can see from the details, the certificate was valid from installation for one year only. It is an automatically generated certificate, there is no need for a official, since this server is only used internal.

Is there an easy way to extend the certificate, or replace it without much work?

Thanks,
Sam

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Exchange Server 2007: Renewing the self-signed certificate

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