Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
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Sign in with your Microsoft account on the Services & Subscriptions page online to check your Subscription expiry status.
https://account.microsoft.com/services
If you see an incorrect expiration date, go to https://setup.office.com/redeem/enter-key and try redeeming the key. If it says the key is already redeemed and the expiration date hasn't been updated after 24 Hours, you can get in touch with Microsoft Office Support directly.
Go to this page: https://support.microsoft.com/en-us/home/contact
Type Talk to an agent, then click Get Help.
At the bottom of the page, click Contact Support. Sign in to your Microsoft account if needed. If you face the same issue with the affected account, use a different account to contact Microsoft Support.
Select Other Products, then Billing and Account Profile questions, then Confirm.
Click Chat with a support agent in your web browser.