When you restart the Microsoft Exchange 2000 Server IMAP4 or POP3 services, you may occasionally see the following error message:
Could not start the Microsoft Exchange IMAP4\POP3 Service on Local Computer
Error 1056: An instance of the service is already running.
You may also see the following errors in the Event Viewer application log:
Event Type: Information
Event Source: MSExchange IMAP4\POP3 Interface
Event Category: General
Event ID: 11600
Description:
Attempting to start the Microsoft Exchange IMAP4\POP3 Service
Event Type: Error
Event Source: MSExchange IMAP4\POP3 Interface
Event Category: General
Event ID: 11604
Description:
Microsoft Exchange IMAP4\POP3 Service is already running.
Event Type: Error
Event Source: MSExchange IMAP4\POP3 Interface
Event Category: General
Event ID: 13000
Description:
An error occurred while starting the Microsoft Exchange IMAP4 Service: the call to DwInitializeService() failed with error 0x420.
Event Type: Information
Event Source: MSExchange IMAP4\POP3 Interface
Event Category: General
Event ID: 11602
Description:
Attempting to stop the Microsoft Exchange IMAP4\POP3 Service
Event Type: Error
Event Source: MSExchange IMAP4\POP3 Interface
Event Category: General
Event ID: 13000
Description:
An error occurred while starting the Microsoft Exchange IMAP4\POP3 Service: the call to IIS_SERVICE::StartServiceOperation() failed with error 0x420.