Demande d'aide dans mon programme

Bonjour,

J'ai ce problème si quelqu'un peut m'aider je suis preneur

<Trace Tag="AutodiscoverConfiguration" Tid="1" Time="2017-07-08 19:59:32Z">
Starting SCP lookup for domainName='etu.hesge.ch', root path=''
</Trace>
<Trace Tag="AutodiscoverConfiguration" Tid="1" Time="2017-07-08 19:59:35Z">
LDAP call failed, exception: System.Runtime.InteropServices.COMException (0x8007054B): Le domaine spécifié n'existe pas ou n'a pas pu être contacté.

à System.DirectoryServices.DirectoryEntry.Bind(Boolean throwIfFail)
à System.DirectoryServices.DirectoryEntry.Bind()
à System.DirectoryServices.DirectoryEntry.get_AdsObject()
à System.DirectoryServices.PropertyValueCollection.PopulateList()
à System.DirectoryServices.PropertyValueCollection..ctor(DirectoryEntry entry, String propertyName)
à System.DirectoryServices.PropertyCollection.get_Item(String propertyName)
à Microsoft.Exchange.WebServices.Autodiscover.DirectoryHelper.GetScpUrlList(String domainName, String ldapPath, Int32& maxHops) dans C:\Users\omarl\Desktop\ews-managed-api-master\ews-managed-api-master\Autodiscover\DirectoryHelper.cs:ligne 143
à Microsoft.Exchange.WebServices.Autodiscover.DirectoryHelper.GetAutodiscoverScpUrlsForDomain(String domainName) dans C:\Users\omarl\Desktop\ews-managed-api-master\ews-managed-api-master\Autodiscover\DirectoryHelper.cs:ligne 83
</Trace>
<Trace Tag="AutodiscoverConfiguration" Tid="1" Time="2017-07-08 19:59:35Z">
Trying to call Autodiscover for ***@*** on https://etu.hesge.ch/autodiscover/autodiscover.xml.
</Trace>
<Trace Tag="AutodiscoverRequestHttpHeaders" Tid="1" Time="2017-07-08 19:59:35Z">
POST /autodiscover/autodiscover.xml HTTP/1.1
Content-Type: text/xml; charset=utf-8
Accept: text/xml
User-Agent: ExchangeServicesClient/0.0.0.0


</Trace>
<Trace Tag="AutodiscoverRequest" Tid="1" Time="2017-07-08 19:59:36Z" Version="0.0.0.0">
<Autodiscover xmlns="http://schemas.microsoft.com/exchange/autodiscover/outlook/requestschema/2006">
<Request>
<EMailAddress>***@***</EMailAddress>
<AcceptableResponseSchema>http://schemas.microsoft.com/exchange/autodiscover/outlook/responseschema/2006a</AcceptableResponseSchema>
</Request>
</Autodiscover>
</Trace>
<Trace Tag="AutodiscoverResponseHttpHeaders" Tid="1" Time="2017-07-08 19:59:38Z">
HTTP/1.1 401 Unauthorized
request-id: 9a3b7240-9d14-44b8-aaa9-dec77aa1ee82
Server: Microsoft-IIS/10.0
WWW-Authenticate: Negotiate,NTLM,Basic realm="etu.hesge.ch"
X-Powered-By: ASP.NET
X-FEServer: HES-506
Date: Sat, 08 Jul 2017 19:59:39 GMT
Content-Length: 0


</Trace>
<Trace Tag="AutodiscoverConfiguration" Tid="1" Time="2017-07-08 19:59:38Z">
failed: WebException (Le serveur distant a retourné une erreur : (401) Non autorisé.)
</Trace>
<Trace Tag="AutodiscoverConfiguration" Tid="1" Time="2017-07-08 19:59:38Z">
Trying to call Autodiscover for ***@*** on https://autodiscover.etu.hesge.ch/autodiscover/autodiscover.xml.
</Trace>
<Trace Tag="AutodiscoverRequestHttpHeaders" Tid="1" Time="2017-07-08 19:59:38Z">
POST /autodiscover/autodiscover.xml HTTP/1.1
Content-Type: text/xml; charset=utf-8
Accept: text/xml
User-Agent: ExchangeServicesClient/0.0.0.0


</Trace>
<Trace Tag="AutodiscoverConfiguration" Tid="1" Time="2017-07-08 19:59:38Z">
failed: WebException (Le nom distant n'a pas pu être résolu: 'autodiscover.etu.hesge.ch')
</Trace>
<Trace Tag="AutodiscoverConfiguration" Tid="1" Time="2017-07-08 19:59:38Z">
Trying to get Autodiscover redirection URL from http://autodiscover.etu.hesge.ch/autodiscover/autodiscover.xml.
</Trace>
<Trace Tag="AutodiscoverConfiguration" Tid="1" Time="2017-07-08 19:59:38Z">
Request error: Le nom distant n'a pas pu être résolu: 'autodiscover.etu.hesge.ch'
</Trace>
<Trace Tag="AutodiscoverConfiguration" Tid="1" Time="2017-07-08 19:59:38Z">
No Autodiscover redirection URL was returned.
</Trace>
<Trace Tag="AutodiscoverConfiguration" Tid="1" Time="2017-07-08 19:59:38Z">
Trying to get Autodiscover host from DNS SRV record for etu.hesge.ch.
</Trace>
<Trace Tag="AutodiscoverConfiguration" Tid="1" Time="2017-07-08 19:59:38Z">
1 SRV records were returned.
</Trace>
<Trace Tag="AutodiscoverConfiguration" Tid="1" Time="2017-07-08 19:59:38Z">
Returning SRV record 0 of 1 records. Target: outlook.ge.ch, Priority: 0, Weight: 0
</Trace>
<Trace Tag="AutodiscoverConfiguration" Tid="1" Time="2017-07-08 19:59:38Z">
DNS query for SRV record for domain etu.hesge.ch found outlook.ge.ch
</Trace>
<Trace Tag="AutodiscoverConfiguration" Tid="1" Time="2017-07-08 19:59:38Z">
Autodiscover host outlook.ge.ch was returned.
</Trace>
<Trace Tag="AutodiscoverConfiguration" Tid="1" Time="2017-07-08 19:59:38Z">
Trying to call Autodiscover for ***@*** on https://outlook.ge.ch/autodiscover/autodiscover.xml.
</Trace>
<Trace Tag="AutodiscoverRequestHttpHeaders" Tid="1" Time="2017-07-08 19:59:38Z">
POST /autodiscover/autodiscover.xml HTTP/1.1
Content-Type: text/xml; charset=utf-8
Accept: text/xml
User-Agent: ExchangeServicesClient/0.0.0.0


</Trace>
<Trace Tag="AutodiscoverConfiguration" Tid="1" Time="2017-07-08 19:59:38Z">
failed: WebException (Le nom distant n'a pas pu être résolu: 'outlook.ge.ch')
</Trace>