Hi @Palina Kavalchuk
Welcome to our forum!
Please kindly understand that the Outlook tag here we mainly focus on general issues about Outlook desktop client.
As far as I know, to roll back an Outlook add-in to a previous version, you usually need to go through a resubmission process. Unfortunately, once a new version is approved and available in the Office Store, there's no direct way to perform an emergency rollback.
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