You should renew the cert from the Exchange Server and run through the standard process instead:
Installing "Reissued" SSL Certificate on Exchange 2019 Hybrid Servers
mara2021
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We have a hybrid deployment. ADsync. The servers are 2019. The users are on exchange online. The public SSL certificate is Godaddy that renews every 13 months. It expires next month. We downloaded the reissued certificate (p7b, crt, pem).
How do I install a reissued not a renewed SSL certificate?
Thank you for your help.