@Anna Miller welcome to the community! you might need to reach out to someone internally at your company to ask, maybe like on your IT team? If you can get inside Trello, or know someone who can, then you should be able to see admins in the Workspace Members section by going to https://trello.com/personalbc/members (instead of personalbc type the name of your organization). Although, I assume if they have domain enabled, that means it's a Enterprise account, which means there are multiple workspaces, so that might not work.
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