Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
If Microsoft 365 was purchased through Best Buy, Microsoft cannot manage that subscription’s billing. For download and product key details from a third-party purchase, contact the retailer directly.
For installation, first check whether the purchase included a product key. If it did, redeem it at https://microsoft365.com/setup by signing in with a Microsoft account and entering the key. After redemption, the license is linked to that account and Microsoft 365 can then be installed.
If the purchase was already linked to a Microsoft account, sign in to Services & subscriptions and look for the Microsoft 365 purchase, then select Install.
If Microsoft 365 keeps offering only the 30-day trial, that usually means the purchase has not yet been redeemed to the correct Microsoft account, or the retailer must provide the download/redemption details.
For phone or live support from Microsoft, use Contact Microsoft Support, enter the issue, select Get Help, then Contact Support. In support flow examples, selecting Microsoft 365 and Office and a subscription-related category can route to chat or callback options. If phone support is not shown immediately, support hours can affect availability.
- Manage your Microsoft 365 subscription purchased through a third party
- Download, install, or reinstall Microsoft 365 or Office 2024 on a PC or Mac
- Find and install your Microsoft downloads from Microsoft Store
- Download, install, or reinstall Microsoft 365 or Office 2024 on a PC or Mac
- Try or buy Microsoft 365