By submitting your personal information, you agree that TechTarget and its partners may contact you regarding relevant content, products and special offers.
At what point during a migration from Exchange 5.5 to Exchange 2003 does the Outlook client start to use Active Directory for its name resolution?
By name resolution, you are asking about resolution of SMTP e-mail addresses (rather than DNS name resolution). Exchange 5.5 has its own directory so Outlook checks there when resolving an SMTP address on the To: or Cc: lines. Once your mailbox has moved over to Exchange 2003, the SMTP address goes to the Active Directory for resolution.