Hi Everybody! Trying to move to Exchange 2010 with a new (external) domain. Objective: Gradually move all users form domain1.com to domain2.com on the new Exchange 2010 server. Keeping domain1.com as secondary domain. Personal Experience: Exchange 5.5 to 2003 migration, and 2003 management for several years. Pre-deployment environment: Two 2003 Servers: domain controller and 2003 Exchange. Exchange 2003 connects to POP mailboxes located on ISP mail server using 'eXchange POP3' (third party) application. Steps taken: Added 2008 (Standard, SP2) domain controller, and moved DHCP, DNS and WINS to it. Installed Exchange 2010 on another 2008 (Enterprise, SP2) Server. Registered domain2.com with domain registrar. Observable Results: New 2008 domain controller seems to be operating properly did not use any tools to verify, but it coexisted with the old 2003 controller for several months with no issues. Exchange 2010 shows all current (2003) mailboxes under Recipient Configuration -> Mailboxes. New test mailboxes added to the 2010 showing up on the 2003. Cannot connect to 2010 using Outlook 2003. I don't think OWA and Exchange Control Panel are working right. OWA displays a text-based login form, but rejects any logins. And Exchange Control Panel is not accessible at all. Questions: I never hosted my own mail. What do I do form here? How to finalize the 2010 setup, "assign" domain2.com to it, and then transition users? Thank you!

If OWA and ECP don't work properly (even for mailboxes deployed on Ex2010) it means you misconfigured the CAS role on new server. You should investigate installation logs and use ExBPA to verifu configuration (and of course application event log). CAS is most important for Exchange 2010 because some functionality are shared by Web Services on this Role, and even Outlook 2003 connect to mailboxes through CAS server.Regards, Konrad Sagala, MCT, MCSE+M, MCITP: Exchange 2007/2010

Any update on the issue? It's a cross forest migration, I would use BinaryTree(personally) or Quest migration tool.Gulab Prasad, MCITP: Exchange Server 2010 | MCITP: Exchange Server 2007 MCITP: Lync Server 2010 | MCITP: Windows Server 2008 My Blog | Z-Hire Employee Provisioning App

Thank you for your reply, Konrad! Found couple of errors in the log: -------------------- EMAILSVR - Old retired Exchange 5.5 server. It is no longer aroung. SNOOPY - Current 2003 Exchange Server POST - New 2010 Exchange Server -------------------- ---------------- Log Name: Application Source: MSExchangeRepl Date: 3/3/2012 9:45:52 PM Event ID: 4098 Task Category: Action Level: Error Keywords: Classic User: N/A Computer: post.unionnc.local Description: The Microsoft Exchange Replication service couldn't find a valid configuration for database '34a05c3a-6c91-4982-8082-53456159d3ee' on server 'POST'. Error: Event Xml: <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event"> <System> <Provider Name="MSExchangeRepl" /> <EventID Qualifiers="49156">4098</EventID> <Level>2</Level> <Task>5</Task> <Keywords>0x80000000000000</Keywords> <TimeCreated SystemTime="2012-03-04T02:45:52.000Z" /> <EventRecordID>100173</EventRecordID> <Channel>Application</Channel> <Computer>post.unionnc.local</Computer> <Security /> </System> <EventData> <Data>34a05c3a-6c91-4982-8082-53456159d3ee</Data> <Data>POST</Data> <Data> </Data> </EventData> </Event> ---------------- Log Name: Application Source: MSExchange MailTips Date: 3/3/2012 9:45:47 PM Event ID: 14004 Task Category: MailTips Level: Error Keywords: Classic User: N/A Computer: post.unionnc.local Description: Unable to remove Group Metrics distribution share. Share: GroupMetrics Directory: C:\Program Files\Microsoft\Exchange Server\V14\GroupMetrics Message: 00000842 Event Xml: <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event"> <System> <Provider Name="MSExchange MailTips" /> <EventID Qualifiers="49156">14004</EventID> <Level>2</Level> <Task>14</Task> <Keywords>0x80000000000000</Keywords> <TimeCreated SystemTime="2012-03-04T02:45:47.000Z" /> <EventRecordID>100134</EventRecordID> <Channel>Application</Channel> <Computer>post.unionnc.local</Computer> <Security /> </System> <EventData> <Data>GroupMetrics</Data> <Data>C:\Program Files\Microsoft\Exchange Server\V14\GroupMetrics</Data> <Data>00000842</Data> </EventData> </Event> ---------------- And some in the ExBPA: ------------ Domain: MyDomain Unrecognized Exchange signature Domain MyDomain Active Directory domain 'MyDomain' has an unrecognized Exchange signature. Current DomainPrep version: 12639. ------------ Organization: MyOrganization Offline address book server cannot be found Organization MyOrganization The nominated Exchange server for offline address book 'Default Offline Address List' cannot be found in the organization. The server may be missing, or an error occurred when attempting to collect data from the administrative group where this server resides. Server name: CN=SNOOPY,CN=Servers,CN=MyDomain,CN=Administrative Groups,CN=MyOrganization,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=MyDomain,DC=local. ------------ Organization: MyOrganization Organization MyOrganization Recipient Update Service host cannot be found The nominated Exchange server for Recipient Update Service 'Recipient Update Service (Enterprise Configuration)' cannot be found in the organization. The server may be missing, or an error occurred when attempting to collect data from the administrative group where this server resides. Server name: CN=SNOOPY,CN=Servers,CN=MyDomain,CN=Administrative Groups,CN=MyOrganization,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=MyDomain,DC=local. ------------ Organization: MyOrganization Recipient Update Service host cannot be found Organization MyOrganization The nominated Exchange server for Recipient Update Service 'Recipient Update Service (MyDomain)' cannot be found in the organization. The server may be missing, or an error occurred when attempting to collect data from the administrative group where this server resides. Server name: CN=SNOOPY,CN=Servers,CN=MyDomain,CN=Administrative Groups,CN=MyOrganization,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=MyDomain,DC=local. ------------ Admin Group: MyDomain Admin Group MyDomain Site folder server deleted The site-wide public folder database for administrative group 'MyDomain' has been deleted. Current public folder store: CN=Public Information Store (EMAILSVR)\0ADEL:134714f0-3abd-4aaf-b291-66e67cde6130,CN=Deleted Objects,CN=Configuration,DC=MyDomain,DC=local. ------------ Server: SNOOPY Exchange Server is not supported Server SNOOPY Server SNOOPY is not running Exchange Server 2010 or higher version. It is not supported by this version of Microsoft Exchange Best Practices Analyzer. Please run this tool again from Exchange Server 2007 Management Console. ------------ Is this very bad? Should we try reinstalling the new Exchange? Thanks again for your help.