hier einmal einen Auszug aus dem Log. Vielleicht könnte Ihr mir dann helfen.
08-27 07:54:24.938 29792 29792 I HttpConnection: originalurl is https://lync.esco-antriebstechnik.de?sipuri=sip:mp.haase@esco-antriebstechnik.de
08-27 07:54:24.938 29792 29792 I HttpConnection: decodedurl is https://lync.esco-antriebstechnik.de?sipuri=sip:mp.haase@esco-antriebstechnik.de
08-27 07:54:24.938 29792 29792 I LYNC : INFO TRANSPORT .\transportutilityfunctions.cpp/638:<SentRequest>
08-27 07:54:24.938 29792 29792 I LYNC : GET https://lync.esco-antriebstechnik.de?sipuri=sip:mp.haase@esco-antriebstechnik.de
08-27 07:54:24.938 29792 29792 I LYNC : Request Id: 0x6ea18c48
08-27 07:54:24.938 29792 29792 I LYNC : HttpHeader:Accept application/vnd.microsoft.rtc.autodiscover+xml;v=1
08-27 07:54:24.938 29792 29792 I LYNC :
08-27 07:54:24.938 29792 29792 I LYNC :
08-27 07:54:24.938 29792 29792 I LYNC : </SentRequest>
08-27 07:54:24.938 29792 29792 V HttpConnection: post request: https://lync.esco-antriebstechnik.de?sipuri=sip:mp.haase@esco-antriebstechnik.de
08-27 07:54:24.938 29792 29792 I LYNC : INFO APPLICATION .\ctransportrequestretrialqueue.cpp/348:Submitting new req. GET-UnauthenticatedRootGetRequest(0x6ea18c48)
08-27 07:54:24.938 29792 29792 I LYNC : INFO APPLICATION .\cucwaautodiscoveryservice.cpp/915:Submitting Unauthenticated AutoDiscovery request to https://lync.esco-antriebstechnik.de?sipuri=sip:mp.haase@esco-antriebstechnik.de
08-27 07:54:24.938 29792 30318 V HttpConnection: send request: https://lync.esco-antriebstechnik.de?sipuri=sip:mp.haase@esco-antriebstechnik.de
08-27 07:54:24.938 29792 30318 E HttpEngine: AutoRedirect true for https://lync.esco-antriebstechnik.de?sipuri=sip:mp.haase@esco-antriebstechnik.de and setting it to FALSE for manual handling
08-27 07:54:24.938 29792 29792 I LYNC : INFO APPLICATION .\ctransportrequestretrialqueue.cpp/683:Response received for req. GET-UnauthenticatedRootGetRequest(0x6e7e1bb0): E_ClientForbidden (E2-3-15) (RemoteNetworkPermanentError); Done with
req.; Stopping resend timer
08-27 07:54:24.938 29792 30318 V HttpEngine: Executing request with https://lync.esco-antriebstechnik.de?sipuri=sip:mp.haase@esco-antriebstechnik.de Connection pool count is 6
08-27 07:54:24.958 29792 29792 V ActivityMonitor: Activity Stop: com.microsoft.office.lync.ui.options.CredentialsActivity
08-27 07:54:24.958 29792 29792 V ActivityMonitor: Activity Destroy: com.microsoft.office.lync.ui.options.CredentialsActivity
08-27 07:54:24.968 29792 30318 V HttpConnection: got Response: https://lync.esco-antriebstechnik.de?sipuri=sip:mp.haase@esco-antriebstechnik.de
08-27 07:54:24.978 29792 29792 I LYNC : INFO TRANSPORT .\chttprequestprocessor.cpp/173:Received response of request(UcwaAutoDiscoveryRequest) with status = 0x0
08-27 07:54:24.978 29792 29792 I LYNC : INFO TRANSPORT .\transportutilityfunctions.cpp/917:<ReceivedResponse>
08-27 07:54:24.978 29792 29792 I LYNC : GET https://lync.esco-antriebstechnik.de?sipuri=sip:mp.haase@esco-antriebstechnik.de
08-27 07:54:24.978 29792 29792 I LYNC : Request Id: 0x6ea18c48
08-27 07:54:24.978 29792 29792 I LYNC : HttpHeader:Content-Length 1244
08-27 07:54:24.978 29792 29792 I LYNC : HttpHeader:Content-Type text/html
08-27 07:54:24.978 29792 29792 I LYNC : HttpHeader:Date Tue, 27 Aug 2013 05:54:25 GMT
08-27 07:54:24.978 29792 29792 I LYNC : HttpHeader:Server Microsoft-IIS/8.0
08-27 07:54:24.978 29792 29792 I LYNC : HttpHeader:StatusCode 403
08-27 07:54:24.978 29792 29792 I LYNC : HttpHeader:X-Powered-By ASP.NET
08-27 07:54:24.978 29792 29792 I LYNC :
08-27 07:54:24.978 29792 29792 I LYNC : <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
08-27 07:54:24.978 29792 29792 I LYNC : <html xmlns="http://www.w3.org/1999/xhtml">
08-27 07:54:24.978 29792 29792 I LYNC : <head>
08-27 07:54:24.978 29792 29792 I LYNC : <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"/>
08-27 07:54:24.978 29792 29792 I LYNC : <title>403 - Verboten: Zugriff verweigert.</title>
08-27 07:54:24.978 29792 29792 I LYNC : <style type="text/css">
08-27 07:54:24.978 29792 29792 I LYNC : <!--
08-27 07:54:24.978 29792 29792 I LYNC : body{margin:0;font-size:.7em;font-family:Verdana, Arial, Helvetica, sans-serif;background:#EEEEEE;}
08-27 07:54:24.978 29792 29792 I LYNC : fieldset{padding:0 15px 10px 15px;}
08-27 07:54:24.978 29792 29792 I LYNC : h1{font-size:2.4em;margin:0;color:#FFF;}
08-27 07:54:24.978 29792 29792 I LYNC : h2{font-size:1.7em;margin:0;color:#CC0000;}
08-27 07:54:24.978 29792 29792 I LYNC : h3{font-size:1.2em;margin:10px 0 0 0;color:#000000;}
08-27 07:54:24.978 29792 29792 I LYNC : #header{width:96%;margin:0 0 0 0;padding:6px 2% 6px 2%;font-family:"trebuchet MS", Verdana, sans-serif;color:#FFF;
08-27 07:54:24.978 29792 29792 I LYNC : background-color:#555555;}
08-27 07:54:24.978 29792 29792 I LYNC : #content{margin:0 0 0 2%;;}
08-27 07:54:24.978 29792 29792 I LYNC : .content-container{background:#FFF;width:96%;margin-top:8px;padding:10px;;}
08-27 07:54:24.978 29792 29792 I LYNC : -->
08-27 07:54:24.978 29792 29792 I LYNC : </style>
08-27 07:54:24.978 29792 29792 I LYNC : </head>
08-27 07:54:24.978 29792 29792 I LYNC : <body>
08-27 07:54:24.978 29792 29792 I LYNC : <div id="header"><h1>Serverfehler</h1></div>
08-27 07:54:24.978 29792 29792 I LYNC : <div id="content">
08-27 07:54:24.978 29792 29792 I LYNC : <div class="content-container"><fieldset>
08-27 07:54:24.978 29792 29792 I LYNC : <h2>403 - Verboten: Zugriff verweigert.</h2>
08-27 07:54:24.978 29792 29792 I LYNC : <h3>Die angegebenen Anmeldeinformationen berechtigen Sie nicht, dieses Verzeichnis oder diese Seite anzuzeigen.</h3>
08-27 07:54:24.978 29792 29792 I LYNC : </fieldset></div>
08-27 07:54:24.978 29792 29792 I LYNC : </div>
08-27 07:54:24.978 29792 29792 I LYNC : </body>
08-27 07:54:24.978 29792 29792 I LYNC : </html>
08-27 07:54:24.978 29792 29792 I LYNC :
