Impact of Microsoft EWS Deprecation on Microsoft Teams backup
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Challenge
Due to a recent change deprecating an earlier API (EWS), backups of Microsoft Teams may complete with a "Success" status, while no new channel posts were backed up.
Solution
As it was announced before, Microsoft is deprecating the ability for EWS APIs to access the TeamsMessagesData folder.
In order to resume backup functionality, you must accept Microsoft's Terms of Service for the newer Graph Export API for Teams. Please review KB4322 and take the prescribed actions to ensure all Teams data including channel posts is protected.
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