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:

If you try to access the Exchange Control Panel (ECP) or Outlook Web Access (OWA), you will get a blank website. To solve this issue, open up an elevated command prompt on your Exchange 2013 server.

Check the certificate hash and appliaction ID for 0.0.0.0:443, 0.0.0.0:444 and 127.0.0.1:443. You will notice, that the application ID for this three entries is the same, but the certificate hash for 0.0.0.0:444 differs from the other two entries. And that’s the point. Remove the certificate for 0.0.0.0:444.

Now add it again with the correct certificate hash and application ID.

That’s it. Reboot the Exchange 2013 server and everything should be up and running again.

Microsoft Exchange 2013 shows blank ECP & OWA after changes to SSL certificates
4.8 (96%) 5 votes
Patrick Terlisten
Follow me

Patrick Terlisten

vcloudnine.de is the personal blog of Patrick Terlisten. Patrick has over 15 years experience in IT, especially in the areas infrastructure, cloud, automation and industrialization. Patrick was selected as VMware vExpert (2014 - 2016), as well as PernixData PernixPro.

Feel free to follow him on Twitter and/ or leave a comment.
Patrick Terlisten
Follow me

Related Posts:

3 thoughts on “Microsoft Exchange 2013 shows blank ECP & OWA after changes to SSL certificates

  1. Pingback: Newsletter: July 25, 2015 | Notes from MWhite

  2. Ahmed Mahmoud

    thanks for the post, but in the last step u add sslcert with defined hash (which is not the same hash too) from where do u get this hash??

    Reply

Leave a Reply

Your email address will not be published. Required fields are marked *