It might be required to create a backup job that would only process a particular Microsoft Office 365 service. This might help to improve backup performance of each service as well as to isolate performance issue to a particular service.
This example shows how to create a backup job that would process an entire organization but would include only its Exchange data.
Right-click an organization and select Add to backup job.
Specify the job name and click Next.
To add an organization to the job, click Add > Organization and select the organization.
Select the added organization and click Edit.
Clear every check box except the Mail and Archive checkboxes and click OK.
Proceed with other job settings.
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