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Microsoft 365 の解約方法
最終更新日：2026年3月10日
Microsoft 365 can be cancelled through your Microsoft account. Your OneDrive storage drops from 1TB to 5GB, and you lose access to desktop Office apps but keep the free web versions.
Microsoft 365 を直接解約
公式の解約ページを開きます
ステップバイステップの手順
Website
おすすめ- 1
Go to account.microsoft.com/services
- 2
Sign in with your Microsoft account
- 3
Find your Microsoft 365 subscription
- 4
Click 'Manage' → 'Cancel subscription'
- 5
Follow the prompts and confirm
知っておくと便利
- •OneDrive storage drops from 1TB to 5GB — download files first.
- •Free web versions of Word, Excel, PowerPoint remain available.
- •Desktop apps become read-only after cancellation.
- •Family plan cancellation affects all members.
よくある質問
Do I lose my files?
Not immediately. But your OneDrive storage drops to 5GB. If you're using more, Microsoft will freeze your account until you reduce storage. Download important files first.