If you are creating an event from the Add Event button on the bottom of the lead record, the event window does not include the time zone of the lead, so this can easily lead to confusion and misschedu

My sales people relate better to Company Name than to the first/last Name of a contact when a new appointment has been set for them and displays on the Task or Event list.

It would be beneficial to multiple departments and most likely many businesses to have a simple recurring task reminder feature.

It would be nice to have a reminder for events tasks that reminded me of certain events or tasks prior to 1 day in advance.

Right now, the calendar only displays the first and last name fields for the records that the tasks and events are related to. It would be very helpful to include the company name also.

Allow the ability to update the Due Date of a single or multiple Tasks on the fly.

The Calendar list is the most useful feature for me in your software. I am
there most of my day.
It's hard to use your system because of the lack of certain features:

Some managers would like to give users access to other's calendar but not their data.

It would be nice to be able to add fields from records on the calendar page when view their related tasks and events.

When events are cancelled, deleted, or schedule is changed the user is not notified unless they check the event on their schedule.