You can use the newsletter feature in The Coaches Console to create newsletters (with the blank template provided in COMMUNICATE TAB > NEWSLETTER > CREATE NEWSLETTER). An existing newsletter, created in a different program cannot be uploaded directly as a newsletter. You can instead copy and paste the content, but with special attention to formatting issues. The best recommendation would be to copy/paste the HTML code of the newsletter (using the “Source Code” icon in the Console content editor).
As an alternative option, if your newsletter has already been created, is to upload it as a document that is then attached in an email message that is sent from your Console system. In the future, you need to use the Template under the COMMUNICATE TAB > NEWSLETTER section to create, format and customize the newsletter.