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It doesn't apply to Android, iOS, macOS and Web browser users of the OneNote app. Microsoft's announcement regarding the new OneNote app just applies to Windows 10 and future Windows 11 users. "After the in-app invitation is available, we recommend updating to the OneNote app by October 2025 when both Windows 10 and OneNote for Windows 10 will reach end-of-support," the announcement indicated. 14, 2025 is Microsoft's final deadline to ensure that the new OneNote app is in place. The use of unpatched apps can be a security risk. Being out of support means that the app may continue to work, but it doesn't get patches from Microsoft. They are both scheduled to fall out of support on Oct.
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The OneNote for Windows 10 app is going to reach its end-of-life phase in about four years, along with Windows 10 itself. These invitations will start to appear in "the second half of 2022," the announcement indicated. OneNote for Windows 10 app users will get at an invitation within the app encouraging a switch to the new one. Microsoft announced on Thursday that it's planning to replace the OneNote for Windows 10 app with a new OneNote app.
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