Exchange 2013 CU2 ecp no longer works

After installing exchange CU2, when I go to /ecp to and login, the next page I get is a 404.  See screenshot here:

Also, in event viewer on the server, I am getting a lot of event 1003 errors:

Log Name:      Application
Source:        MSExchange Front End HTTP Proxy
Date:          8/22/2013 1:50:48 PM
Event ID:      1003
Task Category: Core
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      fr-dc-mail01.int.adaptasoft.com
Description:
[Autodiscover] An internal server error occurred. The unhandled exception was: System.NullReferenceException: Object reference not set to an instance of an object.
   at System.Object.GetType()
   at Microsoft.Exchange.HttpProxy.DatacenterRedirectStrategy.CheckLiveIdBasicPartialAuthResult(HttpContext httpContext)
   at Microsoft.Exchange.HttpProxy.AutodiscoverProxyRequestHandler.OnInitializingHandler()
   at Microsoft.Exchange.HttpProxy.ProxyRequestHandler.<>c__DisplayClass8.<Run>b__7()
   at Microsoft.Exchange.Common.IL.ILUtil.DoTryFilterCatch(TryDelegate tryDelegate, FilterDelegate filterDelegate, CatchDelegate catchDelegate)
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="MSExchange Front End HTTP Proxy" />
    <EventID Qualifiers="49152">1003</EventID>
    <Level>2</Level>
    <Task>1</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2013-08-22T17:50:48.000000000Z" />
    <EventRecordID>875372</EventRecordID>
    <Channel>Application</Channel>
    <Computer>fr-dc-mail01.int.adaptasoft.com</Computer>
    <Security />
  </System>
  <EventData>
    <Data>Autodiscover</Data>
    <Data>System.NullReferenceException: Object reference not set to an instance of an object.
   at System.Object.GetType()
   at Microsoft.Exchange.HttpProxy.DatacenterRedirectStrategy.CheckLiveIdBasicPartialAuthResult(HttpContext httpContext)
   at Microsoft.Exchange.HttpProxy.AutodiscoverProxyRequestHandler.OnInitializingHandler()
   at Microsoft.Exchange.HttpProxy.ProxyRequestHandler.&lt;&gt;c__DisplayClass8.&lt;Run&gt;b__7()
   at Microsoft.Exchange.Common.IL.ILUtil.DoTryFilterCatch(TryDelegate tryDelegate, FilterDelegate filterDelegate, CatchDelegate catchDelegate)</Data>
  </EventData>
</Event>

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~David