Plesk Controlpanel

Additionally to all supported Windows Server operating systems, Linux distributions like Debian 8 and 9, Ubuntu 16, CentOS/Red Hat Enterprise Linux 7, and CloudLinux 7 are supported. The repair kit is designed to identify and resolve a variety of common technical issues that can occur on these operating systems.

For fresh installs of Plesk Obsidian, the upcoming features are already turned on:
Apache's graceful restart feature is now reliable enough to be enabled by default to reduce downtime for websites.
SPF, DKIM, and DMARC for incoming and outgoing emails.
Version 0.10 of Fail2Ban and ModSecurity come pre-activated.
New websites come pre-configured with the SEO-friendly HTTP > HTTPS redirect enabled.

Microsoft Outlook and Thunderbird.
The "Mail Settings Auto-Discovery" feature in Plesk is designed to simplify the process of setting up email accounts on various mail clients. This feature supports many popular email clients, including:

• Microsoft Outlook
• Mozilla Thunderbird
• Apple Mail

Note that this is not an exhaustive list, and there may be other mail clients that support the auto-discovery feature. However, the above clients are some of the most commonly used and are generally known to work well with Plesk's auto-discovery feature.

You want to create additional users who will be able to log in to Plesk and have access to certain, predefined functionality. Such as: creating mailboxes, managing databases, or performing backups. The functionality available to additional users is determined by creating, configuring, and assigning user roles to additional users. We describe how to add a user to a Plesk server in this article.

You can learn how to set up DNS in Plesk in this article. DNS (Domain Name System) is a network protocol that is used to translate domain names to numerical  IP addresses or the other way around.