XADM: Exception Error 0XC0000009A with POP3 or SMTP Usage

SYMPTOMS

• When you are running Microsoft Exchange Server 5.5 on Windows NT Server 4.0 with Service Pack 3, you receive an exception error when a heavy load is placed on the local directory.
• When POP3 clients or SMTP clients initialize sessions with their Microsoft Exchange directory, an exception is generated, stating:
  The exception unknown software exception (0XC0000009A) occurred in the
  application at the location 0x77f88C01. Click OK to terminate
  application.
• If you try to stop the Exchange services, the computer stops responding (hangs). You must restart your computer to regain control. On a computer with the SMTP or POP3 user capability that is in the process of high user load, the system produces the exception mentioned previously.