How many Server Roles are present in the Exchange Server?

In Exchange Server, there are five primary server roles that fulfill different functions to manage and deliver communication services. These roles are:

1. Mailbox Role: This is the primary role that stores mailbox databases and handles all mailbox functions, including email storage, calendar management, and tasks.

2. Client Access Role: This role is responsible for handling all client access to Exchange services, such as Outlook Web App and mobile connections, ensuring users can connect to their mailboxes.

3. Transport Role: This role manages the flow of email within and outside the Exchange organization. It includes components for sending, receiving, and routing messages.

4. Unified Messaging Role: This role integrates voice mail and email, allowing users to manage their messages in a more unified manner.

5. Edge Transport Role: This role is deployed in a perimeter network and is responsible for filtering messages entering or leaving the Exchange organization, providing additional security.

These roles can be deployed in various configurations depending on the organization's size and architecture, but the total number of distinct server roles in Exchange Server is indeed five. Understanding these roles is essential for effectively managing an Exchange Server environment, as each role plays a crucial part in delivering the overall service provided by the system