Our Universal SSL Certificate was recently updated, and we have a corporate client that apparently whitelists the certificates. Of course the new certificate, which expires in October 2020, caused all traffic to fail.
First question: How long has this certificate been valid for in the past? 7 months seems like an odd expiration term. We’ve had our current set up for several years and this hasn’t happened before. (Perhaps the whitelisting part is new.)
Second question: How can we prevent this from happening again? Will we have to wait for the certificate be used, and then whitelist it (thus creating downtime inbetween)?
Or am I totally misunderstanding something?