- Plesk for Windows
How-to force Horde webmail to use HTTPS/SSL?
Connect to the server via RDP.
%plesk_dir%\Webmail\horde\horde\config\conf.phpand set it as below:
CONFIG_TEXT: $conf['use_ssl'] =1
$conf['server']['port'] = 443
Note: to enter
%plesk_dir%open File Explorer and in the address field type
In Internet Information Services Manager (IIS) go to Application Pools > webmail(horde) > Stop it and Start after that:
Note: Webmail SSL certificate has to be installed already. To install it, follow instructions from the article How to install SSL certificate on webmail in Plesk Onyx