Get the AD users List

Question

The error is The server is not operational. am getting this error reach below red marked find all line.... am new to azure can you anyone fix this?

 

 

//Domain Name : EnergyFundersDemoB2C.onmicrosoft.com

DirectoryEntry myLdapConnection = new DirectoryEntry("LDAP://EnergyFundersDemoB2C.onmicrosoft.com");

DirectorySearcher search = new DirectorySearcher(myLdapConnection) { Filter = ("(objectClass=user)") };

search.CacheResults = true;

SearchResultCollection allResults = search.FindAll();

DataTable resultsTable = new DataTable();

resultsTable.Columns.Add("UserID");

resultsTable.Columns.Add("EmailID");

foreach (SearchResult searchResult in allResults)

{

MembershipUser myUser = Membership.GetAllUsers()[searchResult.Properties["sAMAccountName"][0].ToString()];

if (myUser == null)

{

DataRow dr = resultsTable.NewRow();

dr["UserID"] = searchResult.Properties["sAMAccountName"][0].ToString();

if (searchResult.Properties["mail"].Count > 0)

{

dr["EmailID"] = searchResult.Properties["mail"][0].ToString();

}

else

{

dr["EmailID"] = "";

}

resultsTable.Rows.Add(dr);

}

else

{ }

}

AllADUsers.DataSource = resultsTable;

AllADUsers.DataBind();