MS Teams app KDVF1 FIX please

Question

MS Teams app KDVF1 FIX please

Jody Petersen 0

I uninstalled my MS Teams app because of the KDVF1 notice that comes up - where can i find the app to install again

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Answer 1

Hi @Jody Petersen,

Thank you for posting your question in the Microsoft Q&A forum.

Based on my research, the error you're encountering occurs because your device is attempting to authenticate using the deprecated KDFv1 algorithm when signing in to Teams (and other Microsoft 365 apps). As of June 2024, Microsoft Entra ID blocks KDFv1 for security reasons, resulting in the error code AADSTS5000611: Symmetric Key Derivation Function version 'KDFV1' is invalid.

If you're using Windows, please follow these steps:

Update your Windows OS to the latest security patch (from July 2021 onward).
Uninstall the old version of Teams from your device.
Download and install the latest version of Teams from Microsoft’s official site: Download Teams Desktop and Mobile Apps | Microsoft Teams

On the download page, select the version that matches your operating system and follow the instructions to install it. By updating your Windows security patch level to include the KDFv1–removal update and then reinstalling Teams, the “KDFV1 invalid” sign-in error will be resolved.

If you have any updates or further questions, feel free to leave a comment under this post. I look forward to hearing from you and continuing to assist.

Thank you again for reaching out and for your patience!

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

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Rin-L 15,665 Reputation points Microsoft External Staff Moderator

2025-10-08T09:31:10.23+00:00

Hi @Jody Petersen,

Just checking in to see if the above information was helpful. If you have any further updates on this issue, please feel free to leave a comment. If you think my reply is helpful to you, please remember to mark it as the Accepted answer.

Warm thanks.
Rin-L 15,665 Reputation points Microsoft External Staff Moderator

2025-10-10T07:10:57.2733333+00:00

Hi @Jody Petersen,

I hope this message finds you well.

This is my second follow-up to check whether your issue has been resolved. I truly want to ensure your experience is as smooth as possible. If your problem is still ongoing or if you have faced any new difficulties, please share more details about the current steps you are stuck on. I am here and happy to provide further help whenever you need it.

While waiting for your response, I will continue tracking other customer questions on the forum to ensure everyone receives timely support. If you have additional questions, please feel free to tag my name in your reply so I can assist you promptly and more personally.

Looking forward to hearing from you soon.

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MS Teams app KDVF1 FIX please

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