The Portal includes a feature to add reminders to your calendar, as you need them. This feature is accessed from:
Property Data, Lease Information (Lease Expiration Date)
Lease Options at the Tenant Information level (Notice Start Date)
Prospect Information Table (Showing Scheduled Date)
Click the Add link when you see it associated with a date. This creates a Calendar event for your MS Outlook or other calendar, with data pertaining to the date. Users can then add notes to the calendar item and save.