Allow using [REMOTESTATUS] in the email subject, not just the body. When you are sending an email about the backup job having finished you can now use [REMOTESTATUS] in the email subject for a more glanceable overview in your email inbox.
Warn about the Console – Akeeba Backup plugin being disabled in the Schedule Automatic Backups page. It's still early the days of Joomla 4 and users are not yet accustomed to the notion that the additional commands they get through Joomla's CLI interface (cli/joomla.php) are implemented by plugins. Therefore it's easy to forget that your CLI backups won't work unless the Console – Akeeba Backup plugin is isntalled and published. So now if it's not installed or not published we'll let you know in the Schedule Automatic Backups page.
Joomla restoration: modify domains in the Admin Tools' Allowed Domains and server config maker features if necessary. If you are restoring a Joomla site to a different domain name the new domian name will be added to Admin Tools' 6 and 7 Allowed Domains feature to let you into your site without a problem right after restoration. Furthermore it will change the configuration settings for the .htaccess Maker, NginX Conf Maker and Web.Conf Maker — but won't change your .htaccess file; you will still have to go to Admin Tools and regenerate the file.
Bug fixes and minor improvements. Please take a look at the CHANGELOG below.
Akeeba Backup version 9 will only run on Joomla 4. If you still have a Joomla 3 site, don't worry! Akeeba Backup 8 will still be maintained and receive support from the release of Joomla 3.10 on August 17th, 2021 up to August 17th, 2023. Do note that Akeeba Backup 8 will no longer receive major new features. These will only be implemented on Akeeba Backup 9.
Also note that starting August 17th, 2021 we no longer support Akeeba Backup 8 on Joomla except for the use case of upgrading from Joomla 3 and with the sole intent of updating it to Akeeba Backup 9.
Please consult our Compatibility page. It explains our version support policy and lists which versions of our software are compatible with which versions of Joomla and PHP.