Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
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Your school account is no longer active" with a button says "Reactivate.
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Regarding the error message you have to contact your Office 365 admin.
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How may I find this admin?
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You may refer to the link: https://support.microsoft.com/en-us/office/how-do-i-find-my-microsoft-365-admin-59b8e361-dbb6-407f-8ac3-a30889e7b99b