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134553MARKET SYSTEMS05/03/2026 01:11:35 PM
Initial - CHG0109413 - EMMS Pre-Production Maintenance Activities
Change Number: CHG0109413
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Electricity Market Management System_PreProd
Change Title: EMMS Pre-Production Maintenance Activities
Change Start Date & Time: 16/03/2026 08:00:00
Change End Date & Time: 10/04/2026 17:00:00
Outage Start Date & Time: 23/03/2026 08:00:00
Outage End Date & Time: 27/03/2026 17:00:00
Environment: Pre-Production
Participant Impact and Requirements: The Electricity Market Management System (EMMS) and Gas Supply Hub (GSH) Pre-Production environment will be unavailable during the outage window.
Support Information:
Report any impacts to the AEMO Information and Support Hub or call 1300 236 600.
Please refer to https://aemo.service-now.com/participantportal?id=pp_services_status for any planned/unplanned maintenance activities.
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Electricity Market Management System_PreProd
Change Title: EMMS Pre-Production Maintenance Activities
Change Start Date & Time: 16/03/2026 08:00:00
Change End Date & Time: 10/04/2026 17:00:00
Outage Start Date & Time: 23/03/2026 08:00:00
Outage End Date & Time: 27/03/2026 17:00:00
Environment: Pre-Production
Participant Impact and Requirements: The Electricity Market Management System (EMMS) and Gas Supply Hub (GSH) Pre-Production environment will be unavailable during the outage window.
Support Information:
Report any impacts to the AEMO Information and Support Hub or call 1300 236 600.
Please refer to https://aemo.service-now.com/participantportal?id=pp_services_status for any planned/unplanned maintenance activities.
134399MARKET SYSTEMS04/03/2026 01:17:49 PM
Initial - CHG0109566 - MDM AKS 1.34 Maintenance Release
Change Number: CHG0109566
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: MDM - Meter Data Management_PreProd
Change Title: MDM AKS 1.34 Maintenance Release
Change Start Date & Time: 12/03/2026 12:00:00
Change End Date & Time: 12/03/2026 17:00:00
Outage Start Date & Time: 12/03/2026 12:00:00
Outage End Date & Time: 12/03/2026 16:00:00
Environment: Pre-Production
Participant Impact and Requirements: Users will not be able to access MSATS during the outage period.
Meter data processing and RM reports will not be available during the outage period.
User Rights Management (URM) will continue to operate, however the administration screens will not be accessible.
MSATS B2B/B2M Transactions and B2B MSATS Screens will be unavailable during this outage
NMI Discovery will not be available during the outage period.
CDR and CDP will not be available during the outage period.
Support Information:
Report any impacts to the AEMO Information and Support Hub or call 1300 236 600.
Please refer to https://aemo.service-now.com/participantportal?id=pp_services_status for any planned/unplanned maintenance activities.
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: MDM - Meter Data Management_PreProd
Change Title: MDM AKS 1.34 Maintenance Release
Change Start Date & Time: 12/03/2026 12:00:00
Change End Date & Time: 12/03/2026 17:00:00
Outage Start Date & Time: 12/03/2026 12:00:00
Outage End Date & Time: 12/03/2026 16:00:00
Environment: Pre-Production
Participant Impact and Requirements: Users will not be able to access MSATS during the outage period.
Meter data processing and RM reports will not be available during the outage period.
User Rights Management (URM) will continue to operate, however the administration screens will not be accessible.
MSATS B2B/B2M Transactions and B2B MSATS Screens will be unavailable during this outage
NMI Discovery will not be available during the outage period.
CDR and CDP will not be available during the outage period.
Support Information:
Report any impacts to the AEMO Information and Support Hub or call 1300 236 600.
Please refer to https://aemo.service-now.com/participantportal?id=pp_services_status for any planned/unplanned maintenance activities.
134294MARKET SYSTEMS04/03/2026 08:23:39 AM
Completed - CHG0109382 - NOR Pre-Prod GSH will have scheduled maintenance works outage on 3/03/2026 from 1:00 PM to 5:00 PM (AEST)
Change Number: CHG0109382
Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: Gas Supply Hub GSH
Change Title: NOR Pre-Prod GSH will have scheduled maintenance works outage on 3/03/2026 from 1:00 PM to 5:00 PM (AEST)
Support Information: Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.
Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: Gas Supply Hub GSH
Change Title: NOR Pre-Prod GSH will have scheduled maintenance works outage on 3/03/2026 from 1:00 PM to 5:00 PM (AEST)
Support Information: Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.
134259MARKET SYSTEMS03/03/2026 08:23:21 PM
Completed - CHG0108351 - Planned System Maintenance - Declared Wholesale Gas Market (DWGM)
Change Number: CHG0108351
Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: Declared Wholesale Gas Market
Change Title: Planned System Maintenance - Declared Wholesale Gas Market (DWGM)
Support Information: Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.
Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: Declared Wholesale Gas Market
Change Title: Planned System Maintenance - Declared Wholesale Gas Market (DWGM)
Support Information: Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.
134257MARKET SYSTEMS03/03/2026 04:44:29 PM
Initial - CHG0108407 - EMMS Production Systems will be transferred to the alternative datacentre for maintenance activities.
Change Number: CHG0108407
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Electricity Market Management System
Change Title: EMMS Production Systems will be transferred to the alternative datacentre for maintenance activities .
Change Start Date & Time: 05/03/2026 08:00:00
Change End Date & Time: 11/03/2026 17:00:00
Outage Start Date & Time: 10/03/2026 13:50:00
Outage End Date & Time: 10/03/2026 14:50:00
Environment: Production
Participant Impact and Requirements: EMMS Production Systems will be transferred to the alternative datacentre for maintenance activities.
o Please note that this activity is being performed between 13:50 to 14:50 AEST on 10 March 2026.
o During the window, delivery of FPP calculations through the participant data model may be delayed at various points.
o The Market Portal Services will be intermittently unavailable at this time.
Support Information:
Report any impacts to the AEMO Information and Support Hub or call 1300 236 600.
Please refer to https://aemo.service-now.com/participantportal?id=pp_services_status for any planned/unplanned maintenance activities.
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Electricity Market Management System
Change Title: EMMS Production Systems will be transferred to the alternative datacentre for maintenance activities .
Change Start Date & Time: 05/03/2026 08:00:00
Change End Date & Time: 11/03/2026 17:00:00
Outage Start Date & Time: 10/03/2026 13:50:00
Outage End Date & Time: 10/03/2026 14:50:00
Environment: Production
Participant Impact and Requirements: EMMS Production Systems will be transferred to the alternative datacentre for maintenance activities.
o Please note that this activity is being performed between 13:50 to 14:50 AEST on 10 March 2026.
o During the window, delivery of FPP calculations through the participant data model may be delayed at various points.
o The Market Portal Services will be intermittently unavailable at this time.
Support Information:
Report any impacts to the AEMO Information and Support Hub or call 1300 236 600.
Please refer to https://aemo.service-now.com/participantportal?id=pp_services_status for any planned/unplanned maintenance activities.
134256MARKET SYSTEMS03/03/2026 04:42:07 PM
Initial - CHG0108419 - Identity Service Site Transfer
Change Number: CHG0108419
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Identity Service (IDS)
Change Title: Identity Service Site Transfer
Change Start Date & Time: 10/03/2026 08:00:00
Change End Date & Time: 10/03/2026 22:00:00
Outage Start Date & Time: 10/03/2026 13:50:00
Outage End Date & Time: 10/03/2026 14:05:00
Environment: Production
Participant Impact and Requirements: Identity Service is used by multiple systems for user authorisation and authentication.
Identity Service is mostly used by the following systems:
*MSATS
*APIs (EMMS, GBB, MSATS)
*WEM
*Internal / Markets Portal Services
*NOS
*AMP
Identity Service may cause users to experience outages or few session issues for logins initated between 13:50 to 14:05 Market Time on 10/March/2026.
Internal / Market Portal Services will have an outage due to EMMS site transfer activities carried out in parallel, under a seperate change.
Support Information:
Report any impacts to the AEMO Information and Support Hub or call 1300 236 600.
Please refer to https://aemo.service-now.com/participantportal?id=pp_services_status for any planned/unplanned maintenance activities.
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Identity Service (IDS)
Change Title: Identity Service Site Transfer
Change Start Date & Time: 10/03/2026 08:00:00
Change End Date & Time: 10/03/2026 22:00:00
Outage Start Date & Time: 10/03/2026 13:50:00
Outage End Date & Time: 10/03/2026 14:05:00
Environment: Production
Participant Impact and Requirements: Identity Service is used by multiple systems for user authorisation and authentication.
Identity Service is mostly used by the following systems:
*MSATS
*APIs (EMMS, GBB, MSATS)
*WEM
*Internal / Markets Portal Services
*NOS
*AMP
Identity Service may cause users to experience outages or few session issues for logins initated between 13:50 to 14:05 Market Time on 10/March/2026.
Internal / Market Portal Services will have an outage due to EMMS site transfer activities carried out in parallel, under a seperate change.
Support Information:
Report any impacts to the AEMO Information and Support Hub or call 1300 236 600.
Please refer to https://aemo.service-now.com/participantportal?id=pp_services_status for any planned/unplanned maintenance activities.
134204MARKET SYSTEMS03/03/2026 02:16:16 PM
Initial - CHG0109407 - Planned maintenance to Cisco ISE Servers
Change Number: CHG0109407
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Local Area Network
Change Title: Planned maintenance to Cisco ISE Servers
Change Start Date & Time: 05/03/2026 17:00:00
Change End Date & Time: 05/03/2026 21:00:00
Outage Start Date & Time: 05/03/2026 17:00:00
Outage End Date & Time: 05/03/2026 21:00:00
Environment: Production
Participant Impact and Requirements: The following impacts are expected to participant connectivity during this planned outage:
IPWAN Participants - No impact is expected
Lan-2-Lan VPN Participants (IPSEC) - No impact is expected
B2B VPN - No impact is expected.
SSL VPN Participants: There may be a delay in authenticating to the SSL VPN however existing connections should not be impacted.
GASHUB: No impact is expected.
Any other expected impacts, in addition to those listed above, will be communicated in advance.
Support Information:
Report any impacts to the AEMO Information and Support Hub or call 1300 236 600.
Please refer to https://aemo.service-now.com/participantportal?id=pp_services_status for any planned/unplanned maintenance activities.
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Local Area Network
Change Title: Planned maintenance to Cisco ISE Servers
Change Start Date & Time: 05/03/2026 17:00:00
Change End Date & Time: 05/03/2026 21:00:00
Outage Start Date & Time: 05/03/2026 17:00:00
Outage End Date & Time: 05/03/2026 21:00:00
Environment: Production
Participant Impact and Requirements: The following impacts are expected to participant connectivity during this planned outage:
IPWAN Participants - No impact is expected
Lan-2-Lan VPN Participants (IPSEC) - No impact is expected
B2B VPN - No impact is expected.
SSL VPN Participants: There may be a delay in authenticating to the SSL VPN however existing connections should not be impacted.
GASHUB: No impact is expected.
Any other expected impacts, in addition to those listed above, will be communicated in advance.
Support Information:
Report any impacts to the AEMO Information and Support Hub or call 1300 236 600.
Please refer to https://aemo.service-now.com/participantportal?id=pp_services_status for any planned/unplanned maintenance activities.
134114MARKET SYSTEMS03/03/2026 10:34:38 AM
Completed - CHG0108534 - MSATS 56.0 Maintenance Release
Change Number: CHG0108534
Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: MSATS - Market Settlement & Transfer System
Change Title: MSATS 56.0 Maintenance Release
Support Information: Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.
Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: MSATS - Market Settlement & Transfer System
Change Title: MSATS 56.0 Maintenance Release
Support Information: Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.
133981MARKET SYSTEMS01/03/2026 12:28:13 PM
Completed - CHG0108534 - MSATS 56.0 Maintenance Release
Change Number: CHG0108534
Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: MSATS - Market Settlement & Transfer System
Change Title: MSATS 56.0 Maintenance Release
Support Information: Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.
Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: MSATS - Market Settlement & Transfer System
Change Title: MSATS 56.0 Maintenance Release
Support Information: Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.