private ADServerInfo GetDirectoryServer(string partitionFqdn, ADRole role)
        {
            ExTraceGlobals.TopologyProviderTracer.TraceDebug <string, ADRole>((long)this.GetHashCode(), "GetDirectoryServer PartitionFqdn {0}. Role {1}", partitionFqdn, role);
            LocatorFlags locatorFlags = LocatorFlags.ForceRediscovery | LocatorFlags.DirectoryServicesRequired | LocatorFlags.ReturnDnsName;
            string       text         = partitionFqdn;

            if (ADRole.GlobalCatalog == role)
            {
                ADObjectId rootDomainNamingContext = base.GetRootDomainNamingContext(partitionFqdn);
                ADObjectId domainNamingContext     = base.GetDomainNamingContext(partitionFqdn);
                if (!rootDomainNamingContext.DistinguishedName.Equals(domainNamingContext.DistinguishedName, StringComparison.OrdinalIgnoreCase))
                {
                    text = NativeHelpers.CanonicalNameFromDistinguishedName(rootDomainNamingContext.DistinguishedName);
                }
                locatorFlags |= LocatorFlags.GCRequired;
            }
            ExTraceGlobals.TopologyProviderTracer.TraceDebug <string, string, LocatorFlags>((long)this.GetHashCode(), "GetDirectoryServer. Partition Fqdn {0} Parent Domain {1}. Flags {2}", partitionFqdn, text, locatorFlags);
            ADServerInfo         serverInfo           = new ADServerInfo(null, text, (ADRole.GlobalCatalog == role) ? 3268 : 389, null, 100, AuthType.Kerberos, true);
            PooledLdapConnection pooledLdapConnection = null;
            ADServerInfo         adserverInfo         = null;

            try
            {
                pooledLdapConnection = LdapConnectionPool.CreateOneTimeConnection(null, serverInfo, locatorFlags);
                if (!string.IsNullOrEmpty(pooledLdapConnection.SessionOptions.HostName))
                {
                    adserverInfo = pooledLdapConnection.ADServerInfo.CloneWithServerNameResolved(pooledLdapConnection.SessionOptions.HostName);
                }
                ExTraceGlobals.TopologyProviderTracer.TraceDebug <string, string>((long)this.GetHashCode(), "GetDirectoryServer. Partition Fqdn {0}. Server {1}", partitionFqdn, pooledLdapConnection.SessionOptions.HostName ?? string.Empty);
            }
            finally
            {
                if (pooledLdapConnection != null)
                {
                    pooledLdapConnection.ReturnToPool();
                }
            }
            string          text2;
            LocalizedString localizedString;

            if (adserverInfo != null && SuitabilityVerifier.IsServerSuitableIgnoreExceptions(adserverInfo.Fqdn, ADRole.GlobalCatalog == role, null, out text2, out localizedString))
            {
                return(adserverInfo);
            }
            return(LdapTopologyProvider.FindDirectoryServerForForestOrDomain(text, null, ADRole.GlobalCatalog == role));
        }
        public override ADServerInfo GetServerFromDomainDN(string distinguishedName, NetworkCredential credential)
        {
            ExTraceGlobals.TopologyProviderTracer.TraceDebug <string, string>((long)this.GetHashCode(), "Need server from domain {0}. Credentials {1} NULL", distinguishedName, (credential == null) ? "are" : "are NOT");
            ADServerInfo remoteServerFromDomainFqdn = this.GetRemoteServerFromDomainFqdn(NativeHelpers.CanonicalNameFromDistinguishedName(distinguishedName), credential);

            ExTraceGlobals.TopologyProviderTracer.TraceDebug <string>((long)this.GetHashCode(), "GetServerFromDomainDN returning {0}", remoteServerFromDomainFqdn.FqdnPlusPort);
            return(remoteServerFromDomainFqdn);
        }