Microsoft Outlook

Microsoft Outlook is Microsoft's combined email, calendar and personal information management application, available as a desktop client for Windows and macOS, a web app, and mobile apps for iOS and Android. It is one of the most widely used business communication tools in the world, typically deployed with Microsoft Exchange Online as part of Microsoft 365. The problem Outlook addresses is the coordination of everyday professional communication: managing large volumes of email, arranging meetings across teams and time zones, and keeping contacts and tasks organised in one place. Its approach is to integrate these functions tightly with each other and with the wider Microsoft ecosystem, so scheduling, file sharing and collaboration flow from the inbox with minimal switching between applications. Its familiarity across the workforce is a significant practical advantage, as most employees already know the interface and training requirements are therefore modest when organisations deploy or upgrade it.

Core features include a Focused Inbox that separates priority mail, rules, categories and search, shared mailboxes, and calendars with scheduling assistance, room booking and Microsoft Teams meeting links. Contacts, tasks via Microsoft To Do, and attachments linked to OneDrive and SharePoint support collaborative work, while Microsoft Copilot features in eligible plans can summarise threads and draft replies. Security and compliance capabilities, including encryption, data loss prevention and retention policies, are administered through Microsoft 365 and Microsoft Purview. Outlook also connects to third-party accounts such as Gmail and iCloud, and supports add-ins from CRM, e-signature and productivity vendors. The newer Outlook for Windows is progressively replacing the classic desktop client. It serves organisations of every size and sector, from sole traders to multinational enterprises and government bodies, and a free consumer version is available at Outlook.com. Business pricing is bundled within Microsoft 365 subscriptions and is not published in this listing, and no free trial details are provided here.