The FATCA International Data Exchange Service (IDES) opens for testing from Monday, 1 June 2015 at 12:00 (UTC/GMT -4) to Monday, 8 June 2015 at 12:00 EDT. The test session will be open to users that have completed IDES enrollment by Thursday, 28 May 2015 at 17:00 EDT.
In order to complete the enrollment process, an IRS-issued GIIN, FIN or HCTA Entity ID, a username, and a valid certificate will be required. IDES does not accept wildcard certificates. The FATCA IDES Resources web page (Link) contains a list of recommended certificates authorities. Enrolled users will receive an email with a link to the IDES test server web application and SFTP. For further assistance with enrollment, the IDES Help Desk (Link) is available.