Microsoft Exchange uses Secure Socket Layer (SSL) certificates for many things such as securing email and sending and receiving email on computers cellphones and mobile devices such as iPads or tablets. SSL certificates for Microsoft Exchange are extremely important and when they expire they can break the flow of email. Purchasing the SSL certificate renewals with enough time to get the SSL certificate installed is recommended so that your email does not break.
Palmer Technology Solutions begins notifying customers that have purchased their SSL certificates through us 30 days prior to expiration to help with timely renewals.
Here is a technical article for Microsoft Exchange and SSL certificates!