ALERT: Password reuse activity on multiple endpoints

Rakesh Sukumaran 0 Reputation points

We have started receiving multiple Defender alerts from yesterday - 20th April early morning. "A user on this device is reusing the currently logged in account password on a different credential. Use new and complex password for each credential to keep your information safe." Password reuse activity that is triggered every 1-2 minutes on Microsoft 365 Defender. Does anyone knows or experienced this behavior before? In what scenario does this alert breaks in defender alert. Only User's with OS Windows 11 are triggered. we have verified already with all the applications from the user end and nothing seems to be suspicious. does Microsoft is planning to make any changes if this is false positive and what made this alert to trigger suddenly in the environment.

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  1. Lu Dai-MSFT 28,356 Reputation points

    @Rakesh Sukumaran Thanks for posting in our Q&A.

    For this issue, it is more related to Microsoft Defender. I'm not a support engineer of this product and know little about it. To get more help, it is suggested to contact Microsoft Defender support. Here is the support link:

    Thanks for your understanding and hope everything goes well with you.

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