The ERP Admin Account must be a member of the following groups.
For Exchange 2010, 2013, and 2016: Organization Management group and Domain Admin.
For Exchange 2007 and 2003: Exchange View only Administrator group and Domain Admin.
Transport queues role should be assigned to the user or the Organization Management group in order to run Email Monitoring Reports.
To assign this role to the user:
New-ManagementRoleAssignment -Name TransportRoleAssignment -User 'DOMAIN\userName' -Role 'Transport Queues'
To assign this role to Organization Management group:
New-ManagementRoleAssignment -Name TransportRoleAssignment -SecurityGroup 'Organization Management' -Role 'Transport Queues'