To exclude certain objects from processing, click Add and choose what Users, Groups and/or Sites objects you want to exclude.
Depending on the organization type, you will not be able to exclude Sites objects for On-Premises Exchange organizations, nor you will be able to exclude Groups objects for On-Premises SharePoint organizations.
To remove the object, select it and click Remove.
Editing Exclusion Settings
By default, when you exclude an object, Veeam selects all processing options for this object. To explicitly specify the processing options you need, select an object and click Edit. For more information on available object types and their corresponding processing options, see Understanding Organization Object Types.
You can edit exclusion settings for any objects except objects of the Site and Public Mailbox types.
The figure below demonstrates editing the exclusion settings for the Office 365 group (Amazing Team). In the example below, the Archive, OneDrive, and Group Mail data will be excluded from the backup for the Amazing Team group whereas Mail, Site, and Group Site data will be added to the backup.
You can see the excluded processing options under the Exclude column of the wizard.