Veeam Support Knowledge Base
Microsoft Teams backup fails with the "Object reference not set to an instance of an object" error

Microsoft Teams backup fails with the "Object reference not set to an instance of an object" error

KB ID:	4201
Product:	Veeam Backup for Microsoft 365
Version:	5c (build 5.0.2.22)
Published:	2021-08-25
Last Modified:	2021-09-01

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Challenge

Backup of Microsoft Teams in Veeam Backup for Microsoft 365 fails with the following error:

Error: Object reference not set to an instance of an object.

Cause

This issue is related to recent changes in Microsoft Graph API response syntax to a specific request that Veeam Backup for Microsoft 365 uses to process Microsoft Teams.

Solution

This issue is resolved by Veeam Backup for Microsoft 365 5c cumulative patch KB4187

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