Exchange Server 2013 Blank Page Error 15021

Posted 5 years 337 days ago ago by Christian Burke     0 Comments

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In my normal round of quarterly Windows Updates, I updated my Windows 2012 Server with Exchange Server 2013 on it.  When I ultimately rebooted, Exchange Server seemed to work fine with all services starting, but none of my clients could get to it.  I also found that I was unable to get to the Exchange Management Console.  Actually, I was presented the login page, but when I logged in, I saw simply a blank page.

I checked the Windows logs and found in the System Log a stream of Event Id: 15021 errors.  Specifically, this guy.


When I ran:

netsh http show sslcert

I found that the entry associated with the referred to a certificate hash that did not exist on my server.  I haven’t a clue how it got there.  I don’t know if any of the Windows updates caused that or not.

To solve the problem, I deleted the certificate reference like this:

netsh http delete sslcert ipport=

Then I assigned the certificate that I use for my Exchange Server.  In my case, I use a public certificate from Starfield, but you could have had in internally assigned certificate.  The best was is to copy the data from either the entry or the :443 entry in the netsh http show sslcert and entered:

netsh http add sslcert ipport= certhash=1234567890123435678 appid=”{3e33ghg-h4439fnslk38384729487]” (use the corresponding Cert Hash and Application ID from either of the entries I explained above)

Reboot the machine and watch the mail flow again.


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Christian Burke is currently employed by and provides Unified Communications solutions for Microsoft Corporation.  With his primary focus as a Lync Voice Technology Solutions Professional, he is dedicated to designing and building cutting edge Lync infrastructure for clients around the world.  He created this blog to document some of the many processes he has grown familiar with over the past few years.  He knows that blogs, especially for Lync where good documentation is dodgy at best, are a crucial information source for building the perfect Lync system.  So, this blog is his contribution.  Enjoy.
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