Registered external entities can manage contact and corporate address details using an online MISO tool. After your Local Security Administrator (LSA) has provisioned portal access for you, you can access the tool here: https://markets.midwestiso.org/marketportal/
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The tool eliminates the need for Attachment B or Change of Information Forms only for contact changes and updates.
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To access the tool, your LSA must assign the role allowing this access in the MISO portal.
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The tool complements the Self Service LSA tool used for portal management by your registered LSA.
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Note that this tool does not replace processes for updating Universal Non-Disclosure Agreement Appendix A, mailing list subscriptions, or maintenance of membership contacts; for assistance with these please contact Client Relations at clientrelations@misoenergy.org
For complete instructions to access and use the tool, please see: Corporate Address and Contact Management Tool