Ondrej Žilinec – IT Blog

Last night I removed Domain Controller Role from Exchange 2007 server and we had problem in the morning with Exchange Outlook Web Access (OWA). We couldn’t log in at all. Symptomps:

• Form based authentification was enabled, but Basic was proposed to clients instead
• When users logged in they received 440 Login Timeout error

After couple minutes of googling I found this article which solved problem.

IMHO when computer was demoted from domain controller role it created local SAM database and didn’t use domain created accounts IUSR_ComputerName and IWAM_ComputerName.