Class of Service

Class of service (COS) templates define the mailbox attributes and subscriber permissions and restrictions that control the behavior of the mailbox. Only one COS may be assigned to a mailbox at a time, although a scheduled event template may override the assigned COS for mailboxes that support the use of scheduled events. The COS template is assigned to the mailbox on the Owner Settings property page.

Whether you opt to edit an existing template or create a new one, the system will display the COS Editor dialog as shown in the sections below. Other than what is displayed in the title bar and which buttons are available at the bottom, the dialog is the same in both cases.

To save changes to an existing template, click Save. This option is not available if you are creating a new template.
To save a template with a new file name, click Save As.
To close the editor without saving any changes, click Cancel.