You can set permissions to control user access to all objects in the Protocols container. You grant permission to a user (or group) by assigning the user a role, which defines how much and what type of access a user has. Microsoft Exchange Server provides a number of predefined roles, but you can also create custom roles to meet your needs.
If you have configured the Administrator program to display the Permissions property page for all objects, you can set permissions on each protocol object in the site and server Protocols containers.
Note If you want to use Secure Socket Layer (SSL) encryption with NNTP, POP3, IMAP4, and LDAP, the Microsoft Exchange Server service account must be granted Administrator permissions for the local computer. SSL provides secure data communications using data encryption and decryption.
For more information on permissions, see Microsoft Exchange Server Getting Started.