Normally it is located under Tools\Accounts (you may need to first select 'View/change existing account') highlight you account and select 'Properties' or 'Change...' then select 'More Settings...' go to the Advanced tab and select 'Leave a copy of messages on the server' ..
To begin to create an opportunity for return on investment, the fees charged for cone beam scans can range anywhere from $250 to $600, depending on the facial region scanned, subsequent assessments performed, and who performs and interprets the scan.
The amount of radiation imparted to the patient by some cone beam scanners is very similar to that imparted by a traditional panoramic film. All of the above types of films (excluding medical grade CT scans) can be obtained with this modality (and indeed with time, cone-beam scans may supplant use of these modalities).