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Impact of Microsoft EWS Deprecation on Microsoft Teams backup

KB ID: 4453
Product: Veeam Backup for Microsoft 365
Published: 2023-05-29
Last Modified: 2023-06-01
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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.

More Information

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