Hi Everyone,If I have three sites (Zone 1, Zone 2 and Zone 3)running Exchange 2007 SP1 on Windows 2003 R2 Server. All three sites containtwoservers, oneserver with Hub Transport and Client Access Roles, the second server with Mailbox Role.Users are running Office 2007 with Outlook, they will access their local Client access server for OWA(Even when they are at home), Client Anywhere and OAB(Web Service). My questions are as follow:1. How to setup OWA, so user can access it throught Internet as well as in the office? Like the Internal and External Settings for each OWA? Will External settings must be filled in OWA settings?2. What would be the best practice normally? Should there be only one OWAfor external(Internet), and all sites connect to this OWA when they are on the Internet? Or user are meant to connect to their own one in the local site.3. How to setup OAB and autodiscover for user, since they are now web service, how does user connect to them? Will user connect to the one locally or there should be a central server serving this purpose?4. How to setup if users are connecting to the local Client Access server for OAB and autodiscover?5. If we were going to load balance the Client Access server on the same site, is there any special configuration or consideration? e.g. OWA, Client Anywhere, OAB and autodiscover setting?6. If we are running SCR on the Mailbox server, on the site disaster scenario, althought all mailboxes are activated on the remote site, is there any special consideration or setup on the remote Hub Transport or Client Access Server for thing like OWA, Client Anywhere, OAB and autodiscover, since their mailboxes are moved there. 7. Mail Hub Server, if I were going to setup a Mail Hub at Zone 1, and it will responsible for all incoming and outgoing emails for Zone 1 and Zone 2, even internal emails from Zone 3. All emails from Zone 2 will forward to Hub Transport server at Zone 1 before sending out to external parties.And Zone 1 and Zone 3 can send and receive emails directly from Internet.a. How would I setup the Sender and Receiver connector to meet this requirements? b. Is the email domain setup must be different on Zone 3? E.g Zone 1 and Zone 2 using email domain "@abc.com" and Zone 3 using email domain "@abc.com.uk"?c. Besides, the above two setup if needed, what configuration must be done to meet the above requirements?Thanks in advance for anyone who reponses!Roy

1. How to setup OWA, so user can access it throught Internet as well as in the office? Like the Internal and External Settings for each OWA? Will External settings must be filled in OWA settings?This depends on your DNS settings, if you have external DNS and internal DNS you can use the same URL, or you can allow internal users to go to the Internet to access the OWA.2. What would be the best practice normally? Should there be only one OWAfor external(Internet), and all sites connect to this OWA when they are on the Internet? Or user are meant to connect to their own one in the local site.as for OWA, if you have multiple CAS servers in your enviroment in the different sites you could setup a DNS round robin to point to all three CAS servers from the internet. This would allow you some redundency. If I recall you could add all three of these servers to a WNLB to provide even greater redundency but off the top of my head I can't recall.3. How to setup OAB and autodiscover for user, since they are now web service, how does user connect to them? Will user connect to the one locally or there should be a central server serving this purpose?You need to set the OAB for web distribution in Exchange 2007. Autodiscover is a DNS and then telling the CAS to accept it. There are many wonderful articles out there on autodiscover.4. How to setup if users are connecting to the local Client Access server for OAB and autodiscover?Office 2007 should look for this automatically as long as the CAS is configured to distributing OAB via Web.5. If we were going to load balance the Client Access server on the same site, is there any special configuration or consideration? e.g. OWA, Client Anywhere, OAB and autodiscover setting?Nope.6. If we are running SCR on the Mailbox server, on the site disaster scenario, althought all mailboxes are activated on the remote site, is there any special consideration or setup on the remote Hub Transport or Client Access Server for thing like OWA, Client Anywhere, OAB and autodiscover, since their mailboxes are moved there. Receive connectors are independed of the Hub transport server. So you would have to setup the receive connector. The OWA url is independant of the CAS server so you will have to set up those URLS and import any neccessary security certs etc. Then there are the pesky DNS changes you will have to implement in a failure.7. Mail Hub Server, if I were going to setup a Mail Hub at Zone 1, and it will responsible for all incoming and outgoing emails for Zone 1 and Zone 2, even internal emails from Zone 3. All emails from Zone 2 will forward to Hub Transport server at Zone 1 before sending out to external parties.And Zone 1 and Zone 3 can send and receive emails directly from Internet.a. How would I setup the Sender and Receiver connector to meet this requirements? -- You would have to point your SMTP traffic at all Hub servers to receive incoming email, unless you have a Ironport or something that says to point to these three servers. You do need a hub transport server in each AD Site. You can set up the HubTransport by doing a AD Site link command -- http://technet.microsoft.com/en-us/library/bb266946.aspx. b. Is the email domain setup must be different on Zone 3? E.g Zone 1 and Zone 2 using email domain "@abc.com" and Zone 3 using email domain "@abc.com.uk"? -- You would have to configure the default domains to receive that domain, it is an org wide change. But the receive connector on the Hub server in that site will receive that traffic because you will point your mx record to that Hub transport server. c. Besides, the above two setup if needed, what configuration must be done to meet the above requirements?BP

Hi BP,Firstof all, thanksyou very much for your reply. However, I still got some questions need tofurther clarification.1. How to setup OWA, so user can access it throught Internet as well as in the office? Like the Internal and External Settings for each OWA? Will External settings must be filled in OWA settings?This depends on your DNS settings, if you have external DNS and internal DNS you can use the same URL, or you can allow internal users to go to the Internet to access the OWA.*** However, we are talking about three Client Access Servers, if all of them are available on the Internet and Intranet, all external and internal settings are filled in all OWA of Client Access Server.2. What would be the best practice normally? Should there be only one OWAfor external(Internet), and all sites connect to this OWA when they are on the Internet? Or user are meant to connect to their own one in the local site.as for OWA, if you have multiple CAS servers in your enviroment in the different sites you could setup a DNS round robin to point to all three CAS servers from the internet. This would allow you some redundency. If I recall you could add all three of these servers to a WNLB to provide even greater redundency but off the top of my head I can't recall.3. How to setup OAB and autodiscover for user, since they are now web service, how does user connect to them? Will user connect to the one locally or there should be a central server serving this purpose?You need to set the OAB for web distribution in Exchange 2007. Autodiscover is a DNS and then telling the CAS to accept it. There are many wonderful articles out there on autodiscover.4. How to setup if users are connecting to the local Client Access server for OAB and autodiscover?Office 2007 should look for this automatically as long as the CAS is configured to distributing OAB via Web.***Is there any "best practice" for OAB and autodiscover setup? Should there be a central CS server hosting OAB and autodiscover, or should each CS runs their own OAB and autodiscover service?5. If we were going to load balance the Client Access server on the same site, is there any special configuration or consideration? e.g. OWA, Client Anywhere, OAB and autodiscover setting?Nope.***What about the external and internal settings of OWA, OAB and other services?6. If we are running SCR on the Mailbox server, on the site disaster scenario, althought all mailboxes are activated on the remote site, is there any special consideration or setup on the remote Hub Transport or Client Access Server for thing like OWA, Client Anywhere, OAB and autodiscover, since their mailboxes are moved there. Receive connectors are independed of the Hub transport server. So you would have to setup the receive connector. The OWA url is independant of the CAS server so you will have to set up those URLS and import any neccessary security certs etc. Then there are the pesky DNS changes you will have to implement in a failure.7. Mail Hub Server, if I were going to setup a Mail Hub at Zone 1, and it will responsible for all incoming and outgoing emails for Zone 1 and Zone 2, even internal emails from Zone 3. All emails from Zone 2 will forward to Hub Transport server at Zone 1 before sending out to external parties.And Zone 1 and Zone 3 can send and receive emails directly from Internet.a. How would I setup the Sender and Receiver connector to meet this requirements? -- You would have to point your SMTP traffic at all Hub servers to receive incoming email, unless you have a Ironport or something that says to point to these three servers. You do need a hub transport server in each AD Site. You can set up the HubTransport by doing a AD Site link command -- http://technet.microsoft.com/en-us/library/bb266946.aspx. b. Is the email domain setup must be different on Zone 3? E.g Zone 1 and Zone 2 using email domain "@abc.com" and Zone 3 using email domain "@abc.com.uk"? -- You would have to configure the default domains to receive that domain, it is an org wide change. But the receive connector on the Hub server in that site will receive that traffic because you will point your mx record to that Hub transport server. ***what do you mean by "configure the default domains to receive that domain"? Is using different email domain mandatory with email hub setup?c. Besides, the above two setup if needed, what configuration must be done to meet the above requirements?Roy