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Exchange 2013 Certificate replacement

I have an Exchange 2013 server which works just fine (almost) with all the basic functions and it uses a SAN certificate from GoDaddy.



I will have to add a new name to the cert so I will have to re-key it and re-apply the cert to the mail server. I would like to know if there is any risk I should be aware of before doing this change.



For example, do you think there will be any issues with clients using outlook anywhere? Or mobile clients (mostly IOS/Android)? Would they notice the change in the cert and start complaining?



Thanks,

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