Dial-in users. This feature lets you dial into the group scheduler to update and receive calendar data.
E-mail support. If you already have E-mail in place, look for a group scheduler that supports your flavor of mail or go with a scheduler with built-in messaging. You probably don't want to install a second full-fledged mail system to enable group scheduling.
Find free time. Automatically finds a time when all attendees and resources are available for a meeting.
Wide-area connections. Allows multiple calendar databases to share scheduling information across servers. You'll need this capability to enable enterprise-wide scheduling across a WAN (wide-area network).
Notify nonusers. Sends mail to notify meeting attendees who are not licensed to
use the scheduling application. Some schedules can even notify nonusers via fax.
Off-line users. Allows you to schedule appointments even when you are not attached to a network. Synchronization capabilities ensure that all your appointments are reconciled to a single calendar when you log back on to the network.
Platform support. Make sure the group scheduler operates on all the platforms used in your organization. In a large mixed environment, a consistent interface across platforms can make user training and support much easier.
Proxy. Grants another person access to your calendar. You need this capability if you have a central coordinator or an assistant who tracks your appointments.