Kindly go through the following article:
Disabling ADAL or WAM not recommended for fixing Office sign-in or activation issues
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This problem came after system BIOS update.
Please HELP ME!
a need to reinstall everything all the time.
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If you experience sign-in issues, consider the following recommendations: Manually sign-out of all accounts in the Office app, then restart the app and sign-in again. Reset the Office activation state. If you experience device issues, for example, the device is deleted or disabled, follow these recommendations.
Hope This Helps,
Peter