The User credential provided in the 'Organization Settings' page or while configuring 'Exchange Reporter Plus Service' is not a member of the desired privileged group.
Verify if the user provided in the 'Organization Settings' page is a member of one of the following Groups
The user credential should also have "Send As" and "Receive As" permissions on Organization Mailboxes. When the Product is installed as a Service, the configured Service Account must also be a local system administrator account.
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