ISO New England will perform a maintenance outage in the production and sandbox environments for various applications on Thursday, October 9, 2025, from 14:00 to 17:00 EST.
From 14:00 to 17:00:
· Production and Sandbox Environments: The Internal Transactions, the Financial Assurance Management, Submit Meter Reading, Submit Peak Contribution, and Submit Monthly Regional Network Load applications will be unavailable during this window.
· All MIS Operational reports are delayed.
From 16:00 to 16:30:
· Production Environment: The Dynamic Data Management System (DDMS) will be intermittently unavailable.
