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<p class="MsoNormal">One of our clients has installed the Shibboleth Service Provider 2.5.3 on a Windows 2008 R2 server with IIS 7.5. The SP is correctly initiating the AuthnRequest, but when the browser POSTs the assertion back to the ACS URL, the request
fails with this message:<o:p></o:p></p>
<h1 style="margin:0in;margin-bottom:.0001pt"><span style="font-size:29.0pt;font-family:"Verdana",sans-serif"><o:p> </o:p></span></h1>
<h1 style="margin:0in;margin-bottom:.0001pt"><span style="font-size:29.0pt;font-family:"Verdana",sans-serif;background:silver;mso-highlight:silver">xmltooling::IOException<o:p></o:p></span></h1>
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<span style="font-size:8.5pt;font-family:"Verdana",sans-serif;color:black;background:silver;mso-highlight:silver">The system encountered an error at Wed Mar 18 14:40:47 2015<o:p></o:p></span></p>
<p style="orphans: auto;text-align:start;widows: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style="font-size:8.5pt;font-family:"Verdana",sans-serif;color:black;background:silver;mso-highlight:silver">To report this problem, please contact the site administrator at</span><span class="apple-converted-space"><span style="font-size:8.5pt;font-family:"Verdana",sans-serif;color:black;background:silver;mso-highlight:silver"> <a href="mailto:siteadmin@ourdomainname.com">siteadmin@ourdomainname.com</a></span></span><span class="apple-converted-space"><span style="font-size:8.5pt;font-family:"Verdana",sans-serif;background:silver;mso-highlight:silver">.</span></span><span style="font-size:8.5pt;font-family:"Verdana",sans-serif;color:black;background:silver;mso-highlight:silver"><o:p></o:p></span></p>
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<span style="font-size:8.5pt;font-family:"Verdana",sans-serif;color:black;background:silver;mso-highlight:silver">Please include the following message in any email:<o:p></o:p></span></p>
<p class="error" style="orphans: auto;text-align:start;widows: auto;-webkit-text-stroke-width: 0px;word-spacing:0px">
<span style="font-size:8.5pt;font-family:"Verdana",sans-serif;color:black;background:silver;mso-highlight:silver">xmltooling::IOException at (<a href="https://ourdomainname.com/Shibboleth.sso/SAML2/POST">https://ourdomainname.com/Shibboleth.sso/SAML2/POST</a>)<o:p></o:p></span></p>
<p><span style="font-size:8.5pt;font-family:"Verdana",sans-serif;color:black;background:silver;mso-highlight:silver">Error reading request body from browser (2746).</span><span style="font-size:8.5pt;font-family:"Verdana",sans-serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><br>
(NOTE: I’ve modified the site admin and URL for security purposes).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Any thoughts on what could be causing this? I’m attaching the assertion, though I’ve seen nothing in there that seems immediately suspect (note that I changed domain names in the assertion for security purposes).<o:p></o:p></p>
<p class="MsoNormal"><br>
Thanks in advance.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="color:#1F497D"><img border="0" width="146" height="159" id="Picture_x0020_1" src="cid:image001.png@01D06185.5A127C90" alt="cid:image001.png@01D01537.F005A230"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:#1F497D"><br>
</span><b><span style="font-size:12.0pt;color:#1F497D">James W. Anderson<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="color:#1F497D">Cloud Solution Delivery Architect<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">The Coca-Cola Company<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">404.676.4914 Office<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">404.598.4914 Fax<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">770.653.1033 Mobile<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><a href="mailto:jamesanderson@coca-cola.com"><span style="color:blue">jamesanderson@coca-cola.com</span></a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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