Hi praveen Yes you can have another GC in LAN1 and force the authentication from that GC. I don't remember but you have to tweak the registry to force that. Regards Kuljit ________________________________ From: Praveen Ramaswamy [mailto:ramaswamy_praveen@xxxxxxxxx] Sent: Wednesday, June 29, 2005 7:06 PM To: [ExchangeList] Subject: [exchangelist] RE: MAPI access urgent!! http://www.MSExchange.org/ HI, I got this running now. We are able to connect to exchange 2003 server behind firewall. I have opened following ports from LAN 1 to Exchange server LAN: RPC 135, 53590, 1175,1082,NBT, MS-DS. Not sure all these ports are needed but it started working after opening this. Basicaly i got these ports from firewall log. However connectivity is very slow. If i connect from the same LAN as the exchange server then it is faster, but from the LAN 1 it is slow. Is it because traffic has to pass through firewall or is because this particular LAN do not have ADS, DNS ... Should i install one more GC on this LAN 1 or is there any other better option. RPC over HTTPS works only for win xp sp1 with outlook 2003. We have many 2k OS & old outlook clients also at present and it will take at least two months to move to outlook 2003. Regards Praveen R Praveen Ramaswamy <ramaswamy_praveen@xxxxxxxxx> wrote: http://www.MSExchange.org/ Sorry ..two diffrent IP network. Regards Praveen R Mark Fugatt <markfu@xxxxxxxxxxxxx> wrote: http://www.MSExchange.org/ What do you mean by different networks?, different domains, different forests, different subnets etc etc I would recommend looking at using RPC over HTTP instead of turning your firewall into swiss cheese. Mark Fugatt Dedicated Supportability Engineer (Exchange) Microsoft Services Organisation Desk: +44 (0)118 909 5630 Mobile: +44 (0)7966 858108 MSN IM: markfu@xxxxxxxxxxxxxxxxx Blog: http://www.msmvps.com/exchange http://www.microsoft.com/support <http://www.microsoft.com/support> Dedicated to proactively supporting Microsoft's enterprise Customers This email may contain confidential information. If you are not named on the addressee list, please take no action in relation to this email, do not open any attachment, and please contact the sender (details above) immediately. Information in this email is provided in good faith. If you are a customer of Microsoft, please refer to the terms and conditions which cover the provision of support and consulting services to you/your organization. If you are not corresponding in the course of, or in connection with a Microsoft contract or program with its own terms and conditions, please note that no liability is accepted by Microsoft for the contents of this mail. ________________________________ From: Praveen Ramaswamy [mailto:ramaswamy_praveen@xxxxxxxxx] Sent: 29 June 2005 10:42 To: [ExchangeList] Subject: [exchangelist] MAPI access urgent!! http://www.MSExchange.org/ Hi, I need to allow users from different network to access my exchange 2003 server across the firewall. Can you please let me know what are the ports I need to open to allow MAPI client traffic. We use chekpoint firewall. Regards Praveen R ________________________________ Yahoo! Sports Rekindle the Rivalries. 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