Critical Impact

Critical Impact Events and Alerts


Active Remote Delivery Queue Length Is Very HIGH
    This alert condition indicates that the Active Remote Delivery Queue Length is very high. Active Remote Delivery Queue Length refers to the number of items in the active remote delivery queues. This alert indicates that more than 80 messages have been in the Active Remote Delivery Queue for more than 15 minutes. This indicates that the messages are backing up in one or more queues on the server. Mail flow interruptions in the Exchange environment may occur.
Email Roundtrip Transaction Monitoring Email Round Trip Violation Has Occurred Based On Defined Threshold Time Limit
    This alert condition indicates that the transaction monitoring system has identified an email roundtrip threshold violation. This problem typically occurs when the email roundtrip has either failed to complete in time or has surpassed the configured time limit.
Email Stuck Due To Domain Controller Not Reachable
    This alert condition indicates a significant increase in the Categorizer Queue Length counter. This could indicate server performance issues, issues with Directory Service Access (DSAccess), the Active Directory directory service, or outages with key servers in the Exchange Server organization. An increase in the Categorizer Queue Length counter could lead to a lack of responsiveness in consulting Active Directory or in handing messages off for local delivery or SMTP.
Last modified April 17, 2020