Home > Ask the Microsoft Exchange Experts > Peter terSteeg: Deployment and Migration Questions & Answers > Logging into Exchange with NT vs. AD accounts in mixed mode
Ask The Exchange Expert: Questions & Answers
EMAIL THIS

Logging into Exchange with NT vs. AD accounts in mixed mode

Peter terSteeg EXPERT RESPONSE FROM: Peter terSteeg

Pose a Question
Other Exchange Categories
Meet all Exchange Experts
Become an Expert for this site


Exchange Server tips, tutorials and expert advice
Digg This!    StumbleUpon Toolbar StumbleUpon    Bookmark with Delicious Del.icio.us    Add to Google


>
QUESTION POSED ON: 22 November 2005
I'm planning an NT 4.0/Exchange 5.5 to Windows Server 2003/Exchange 2003 upgrade. In a new, parallel Active Directory deployment, I will use the Active Directory Migration Tool to migrate/copy user accounts to Active Directory. Then, I will use it again to modify the access control lists (ACLs) of the Exchange 5.5 mailboxes, so that the new Active Directory accounts would become the new owners.

After I run that, can I still log in with the old NT accounts and access those mailboxes? Or can I only log in with the Active Directory account from that point on?



Digg This!    StumbleUpon Toolbar StumbleUpon    Bookmark with Delicious Del.icio.us    Add to Google


RELATED CONTENT
Peter terSteeg: Deployment and Migration
Mailbox viewing problems after migrating to Exchange 2007
Migrating mailboxes across domains with the Exchange Management Console
Recovering deleted items after an Exchange 2003 migration
Installing Exchange Server 2003 and a domain controller on the same hardware
Reinstall an Exchange Server 2007 cluster continuous replication node
Outlook Web Access issues after an Exchange 2003 migration
Migrating new users onto Exchange Server 2003
Can Exchange 2003 and Exchange 2007 live on the same domain?
Keeping the old server name after migrating to Exchange Server 2003
Troubleshooting a 64-bit Exchange Server 2007 installation

Microsoft Exchange Server 2003
Changing email address formats in Exchange Server 2003
Should you remove .STM files from Exchange Server 2003?
Troubleshoot 'System Attendant' error messages in OWA
Configuring the default recipient policy in an Exchange 2003 environment
Removing old disclaimers from Exchange Server 2003
ExMerge gotchas to watch for when migrating Exchange 2003 mailboxes
Recovering deleted items after an Exchange 2003 migration
Linking two Exchange 2003 servers in different forests
Microsoft Exchange Server virtualization tutorial
Installing Exchange Server 2003 and a domain controller on the same hardware
Microsoft Exchange Server 2003 Research

Microsoft Exchange Server 5.5
Migrating mailboxes from Exchange Server 5.5 to Windows SBS 2003
Remove Exchange 5.5 servers from a mixed mode Exchange environment
Solve server problems with the Exchange Troubleshooting Assistant tool
Best approaches for upgrading Exchange 5.5 to Exchange 2000 or 2003
Sharing free/busy calendar information between disparate Exchange 5.5 and Exchange 2003 organizations
Can we install another instance of Exchange Server on a second domain controller?
Connecting an Exchange 5.5 server to a new domain controller
Duplicating Exchange 5.5 Global Address views in Exchange Server 2003
Importing an Exchange 5.5 Global Address List into Exchange 2003 Active Directory
Is it safe to upgrade directly from Exchange 5.5 to Exchange Server 2003?
Microsoft Exchange Server 5.5 Research

RELATED RESOURCES
2020software.com, trial software downloads for accounting software, ERP software, CRM software and business software systems
Search Bitpipe.com for the latest white papers and business webcasts
Whatis.com, the online computer dictionary


It depends on the permissions that are modified during the ACL update. If you leave the old NT account as the primary NT account of the Exchange 5.5 mailbox, then the new account should still have access to the resource via SIDHistory. But it would require you to keep the legacy domain online indefinitely, and have a functioning trust in place.

You should determine how long you want to keep the legacy domain online, then re-ACL the primary NT accounts to the new accounts. After that, you can have your users log into the Active Directory domain versus NT.

Do you have comments on this Ask the Expert Q&A? Let us know.
Related information from SearchExchange.com:

  • Learning Center: Toolbox for Exchange administrators
  • Learning Guide: Exchange Server migration
  • Reference Center: Exchange permissions and authentication

    		•



    Search and Browse the Expert Answer Center
    Search and browse more than 25,000 question and answer pairs from more than 250 TechTarget industry experts.
    Browse our Expert Advice



    Outlook Web Access (OWA) Tips and Advice
    HomeNewsTopicsITKnowledge ExchangeTipsAsk the ExpertsMultimediaWhite PapersIT Downloads
    About Us  |  Contact Us  |  For Advertisers  |  For Business Partners  |  Site Index  |  RSS
    SEARCH 
    TechTarget provides technology professionals with the information they need to perform their jobs - from developing strategy, to making cost-effective purchase decisions and managing their organizations' technology projects - with its network of technology-specific websites, events and online magazines.

    TechTarget Corporate Web Site  |  Media Kits  |  Site Map




    All Rights Reserved, Copyright 2004 - 2009, TechTarget | Read our Privacy Policy     		  TechTarget - The IT Media ROI Experts