XChangeIT EDI File Extensions Extension Type .ddo Invoice file ready for loading (single invoice only) .dd2 Invoice file ready for loading (can support multiple invoices in one file) .rtf Return file ready for loading .rtd Return file that has been processed and will be transferred back to XChangeIT .bak A ddo,dd2 or rtf file that has been loaded into Computerlink NOTE: Nothing is changed in a ddo, dd2 or rtf file in the process of loading into Computerlink. This enables these files to be easily reloaded by changing the .bak file extension to the original extension.XchangeIT Client Installation These instructions come from the March 2015 XChangeIT Step by Step Installation Guide Go to the XChangeIT website. Click Login for Existing Members Enter your username and password Select Account Maintenance Select Newsagent Client Click on Download Client Click on InstallPlease note: XChangeIT no longer supports Windows 2000, XP & Vista XChangeIT Link requires a minimum of Microsoft .NET Framework Version 3.5 Click RunInstallation begins Click Install You will now see the installation progress screen. You will then see the initializing screen. Click OK Check your email for a Security Token. Enter your XchangeIT Account number in to the Store number field Enter your Security Token in to the Security Token field Click Activate Click OK to start using XchangeIT Client Congratulations, the installation is complete.