Hello, Company name (GBC) is planning to implement new Windows Domain Controller (DC) in a head office. The company has more than 10 different subsidiaries at the country. Each subsidiary company has its own e-mail address. At each subsidiary of companies there will be (IT Administrator) who will be responsible to manage and maintain users, network, printer and computers through Active Directory. Assume the name of subsidiaries companies are (b1), (b2) and (b3)…. Moreover, each company will have its own SMTP. E-mail address for Head office employees will be (user@ho.com), and for employees at subsidiaries (user@b1.com), (user@b2.com) and so on… Objective: · One Domain Controller (DC) · Manage all users & computer through Head Office via one Active Directory from Head Office or partially via subsidiaries. · Grant required permission to IT Administrator to manage his origination via AD from remote location. · One Exchange Server for all (SMTPs) and manage it via Head Office or subsidiaries. · One Outlook Web Access (OWA) for all (SMTPs) · One Public Folders for all (SMTPs) · One Global Address List (GAL), Calendar, Dynamic Distribution Group and mail contact for all organizations (SMTPs). · Users and computers will be around 3000 or above Questions: 1. It is possible to apply this scenario? 2. What is recommended windows server? 3. What is the recommended Exchange server? 4. Is it recommended to have DC in each subsidiary or one in heard office? 5. Is there another scenario better than what I have mentioned with consideration that each company will have its own SMTP? 6. Any supported document, white paper, tutorial will be appreciated. Looking forward to her from you

Hi , On E2010 SERVER :-- 1) Create a Accepted Domains for b1.com & b2.com . 2) Then Create a Email address policies for those Domain ( @b1.com & @b2.com ) with proper filter OU. 3) Checked whether all the users got the Proper Email address for respective domains ( Primary Email address). 4) Create a Send Connctor -- With * Address Space -- For OutBound 5) For Receiving mail from Internet :-- On the Default receive Connector -- Check permission on Default <SERVER> Receive connector and checked Anonymous users permission And also Create a MX Records for Respective domains (( @b1.com & @b2.com ) on External DNS server and published on the External DNS server. Now you are ready for Mail flow. I hope you got my point. Regards. Shafaquat Ali.M.C.I.T.P Exchange 2007/2010, M.C.I.T.P Windows Server 2008, M.C.T.S OCS Server 2007 R2

Hi Shafaquat, Thank you for reply, with this configuration my understand it clear. However, do all users will have one GAL?

Hi , As per my knowledge Sharing a GAL between different forests is not part of the native Exchange functionality. You would need to install the Identity Integration Feature Pack to sync GAL's or manually export and import the GAL. Regards. Shafaquat Ali.M.C.I.T.P Exchange 2007/2010, M.C.I.T.P Windows Server 2008, M.C.T.S OCS Server 2007 R2

Hi Alhashim, Since you would host all these members in one Exchange organization, all members will share one GAL. A global address list (GAL) is a directory that contains entries for every group, user, and contact within an organization's implementation of Microsoft Exchange Server Related article for you reference: http://technet.microsoft.com/en-us/library/bb232101.aspx Thanks, Elvis

Hi Alhashim, Since you would host all these members in one Exchange organization, all members will share one GAL. A global address list (GAL) is a directory that contains entries for every group, user, and contact within an organization's implementation of Microsoft Exchange Server Related article for you reference: http://technet.microsoft.com/en-us/library/bb232101.aspx Thanks, Elvis