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After you apply Windows NT 4.0 Service Pack 4, Microsoft Exchange Internet Applications and Services may no longer function properly and the following errors are visible in the Event Viewer:
EventID: 1309 Source: MSExchangeDS Description: Register LDAP SSL protocol failed with error 10049. The LDAP SSL server is not available. Make sure port number 636 is not used by another application.
EventID: 11508 Source: MSExchange POP3 Description: Accept clients on POP3 interface failed in function HrRegisterProtocol with error 0x2741.
EventID: 1194 Source: MSExchangeIS Description: Accept client on external interface POP3 failed with error 0x80004005.
EventID: 11506 Source: MSExchange IMAP4 Description: Accept clients on IMAP4 interface failed in function HrRegisterProtocol with error 0x2741.
EventID: 1194 Source: MSExchangeIS Description: Accept client on external interface IMAP4 failed with error 0x80004005.
EventID: 1194 Source: MSExchangeIS Description: Accept client on external interface NNTP failed with error 0x80004005
Windows NT 4.0 Service Pack 4 causes NDISWAN Services to return IP addresses in the order in which they are bound. This change results in IP addresses not currently bound to the TCP/IP stack being returned when making a call to the Winsock API function GetHostbyName(). Microsoft Exchange Server fails to register Internet protocols with these IP addresses.
To resolve this problem, obtain the latest service pack for Windows NT 4.0 or the individual software update. For information on obtaining the latest service pack, please go to:
152734 how to obtain the latest windows nt 4.0 service pack
For information on obtaining the individual software update, contact Microsoft Product Support Services. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web: