Microsoft Exchange 2013 shows blank ECP & OWA after changes to SSL certificates

EDIT This issue is described in KB2971270 and is fixed in CU6. I ran a couple of times in this error. After applying changes to SSL certificates (add, replace or delete a SSL certificate) and rebooting the server, the event log is flooded with events from source “HttpEvent” and event id 15021. The message says: [crayon-59c164101c580656946215/] If … Continue reading Microsoft Exchange 2013 shows blank ECP & OWA after changes to SSL certificates