On Friday 10/22/21 at 8AM our current certificate will expire for our Hosted Exchange platform. Our attempts to renew the certificate with our vendor have failed and after multiple escalations, it was determined that our type of certificate is no longer issued by our current vendor. Every organization in our Hosted Exchange has their own certificate and key pair used to serve their OWA and Outlook instance to maintain best security practices.
We are continuing discussions with them in attempts to renew the certificate and preserve the current implementation with regards to maintaining a unique key pair for each organization.
In the unlikely event that we are unable to continue our relationship with our current vendor we have a backup plan in place to replace the certificates which will occur on Thursday evening from 11PM, through Friday morning at 1AM. If we have to execute the backup plan, services may be temporarily interrupted as we perform the request and swap of the certificates.