V7 AC License installation failure

 V7 AC License installation failure

Check whether the authorization letter information matches the device model, and find that there is no problem with the matching relationship between the authorization letter and the device. It can be successfully activated on the official website, indicating that the device information and the uploaded device did file are normal. The subsequent operation process is to obtain the license installation file and upload it on the device, and install it through the command. By checking the operation log, it is found that the license ak file has been tampered with and is an invalid file. After obtaining the ak file and comparing the content of the normal file, it is found that there is an extra "CR" carriage return character in the tampered ak file. I learned that the mailbox information filled in when obtaining the ak file is a hotmail mailbox. Since the license has been activated and the ak file has been downloaded, it cannot be restarted.