Active directory search does not work when hosted in IIS

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Hi all,

I have a active directory search in my project and works fine when i run from visual studio. But when i host the same in IIS it does not work.

Can anybody please help?

The following is the code i use

System.DirectoryServices.DirectoryEntry entry = new System.DirectoryServices.DirectoryEntry(string.Format("LDAP://{0}", Environment.UserDomainName));
System.DirectoryServices.DirectorySearcher dSearch = new System.DirectoryServices.DirectorySearcher(entry);
//dSearch.Filter = string.Format("(&(objectClass=User)(|(cn={0})(sAMAccountName={0})))", objUserInformation.EmpID);
dSearch.Filter = string.Format("(&(objectClass=User)(|(cn={0})(sAMAccountName={0})))", "E455321");

dSearch.PropertiesToLoad.Add("directReports");

dt.Columns.Add("Name");

dtEmpDet.Columns.Add("Eid");
dtEmpDet.Columns.Add("Email");
this.ClientSideAlertMessage("After col add");

foreach (object objProperty in dSearch.FindOne().Properties["directReports"])
{
    var objProperty1 = objProperty.ToString();
    var subordinatename = objProperty1.Split(',').Select(pair => pair.Split('=').LastOrDefault()).ToArray().GetValue(0);
    System.DirectoryServices.AccountManagement.PrincipalContext ctx = new System.DirectoryServices.AccountManagement.PrincipalContext(System.DirectoryServices.AccountManagement.ContextType.Domain);
    System.DirectoryServices.AccountManagement.UserPrincipal user = System.DirectoryServices.AccountManagement.UserPrincipal.FindByIdentity(ctx, System.DirectoryServices.AccountManagement.IdentityType.DistinguishedName, objProperty1);
    
    //Adding rows to the datatable
    DataRow dr;
    dr = dt.NewRow();
    dr[0] = user.DisplayName;
    dt.Rows.Add(dr);
    DataRow drEmpDet;
    drEmpDet = dtEmpDet.NewRow();
    UserManager objUserManager = new UserManager();
    drEmpDet[0] = objUserManager.GetEmpEid(user.EmailAddress);
    drEmpDet[1] = user.EmailAddress;
    dtEmpDet.Rows.Add(drEmpDet);
}

Thanks in advance,
Joseph