Microsoft has temporarily halted the rollout of its KB5002907 update after reports surfaced of Office 2016 and Office 2019 installations losing activation or disappearing from users' computers.

• The update, intended to help outdated Microsoft 365 Apps installations resume updating, mistakenly removed or deactivated perpetual license versions of Office.
• Affected users reported applications going missing or displaying activation prompts where functional software previously existed.
• Microsoft has provided recovery instructions, guiding users to reactivate or reinstall their purchased Office versions via their Microsoft account dashboard, emphasizing that purchasing a new subscription is not a required recovery step.