MFA Security Issues

How to Reduce Microsoft Authenticator Battery and Background Power Usage

Ayan Masood Oct 9, 2026 869 views

Question details

The user needs to reduce the excessive battery drain and background power usage caused by the Microsoft Authenticator application.

How to Fix High Battery Drain and Background Power Usage in Microsoft Authenticator

Product: Microsoft Authenticator
Device & OS: not provided
Scenario: The user notices unusually high battery consumption by the Authenticator app on their mobile device, leading to overall power concerns.
Observed behavior: Microsoft Authenticator reports unusually high battery usage due to continuous or excessive background activity.

Before you start

Before modifying background settings or clearing app data, ensure you have an alternative multi-factor authentication (MFA) method or backup codes available, in case login prompts are temporarily delayed during troubleshooting.

Solution 1Recommended

Optimize Battery and Background Activity Settings

Use this solution to limit how much power the Authenticator app consumes in the background without completely breaking push notifications.

Mobile operating systems allow you to manage how apps consume battery in the background. Setting the app to 'Optimized' prevents excessive drain while keeping essential notification services active.

Open Device Settings

Navigate to your mobile device's Settings app and tap on 'Apps' or 'App Management'.

Locate Microsoft Authenticator

Scroll through your installed applications list and select 'Authenticator'.

Adjust Battery Usage

Tap on 'Battery' or 'Battery optimization'. Select the 'Optimized' setting rather than 'Unrestricted'. Avoid choosing 'Restricted', as this will prevent authentication prompts from reaching your device.

Optimize Battery and Background Activity Settings

Important Note on Background Restrictions: Do not restrict background activity so severely that push notifications stop working. The app requires background access to receive sign-in requests.

Solution 2

Clear App Cache and Apply Updates

Use this method to resolve software bugs or corrupted temporary files that may cause the app to hang in the background.

Solution 3

Reinstall Microsoft Authenticator

If settings adjustments and cache clearing fail, a clean installation can resolve deep-rooted configuration bugs causing power drain.

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1. Download the App: Visit the official WPS Office website or your device's app store to download the installation file.
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Frequently Asked Questions

Will restricting background activity stop me from getting MFA push notifications?

Yes, if you set the battery usage to 'Restricted' or completely disable background app refresh, Microsoft Authenticator will not be able to receive incoming push notifications for sign-in requests. It is recommended to use the 'Optimized' setting instead.

Why is Microsoft Authenticator running in the background constantly?

The app runs in the background to maintain a connection to authentication servers, listen for incoming push notifications for passwordless or MFA sign-ins, and sync backup data to your cloud account.

Can I force stop the Authenticator app to save battery immediately?

You can force stop the app through your device's app settings. However, doing so will completely shut down the app's services. You will not receive any MFA prompts until you manually open the app again.