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Microsoft 365 and Office | Install, redeem, activate | For home | Windows
Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Can you go check your Windows Settings > Windows update, and see if you might have KB5085516 available to install?
KB5085516 is released on March 21st to address Microsoft account sign in issue among some apps caused by KB5079473 https://support.microsoft.com/en-us/topic/march-21-2026-kb5085516-os-builds-26200-8039-and-26100-8039-out-of-band-09e85404-1cb6-4ed4-9ca5-3e40d74307b9