Recipient
Make sure the program is assigned to the right customer.
To do this, go to the customer file, under the “Plans” tab.
Visibility
For customers to see their program, the program's visibility must include your customer:
Published program
Make sure your program is published. As long as it is in draft form, the program will remain invisible to customers and other professionals.
Confirmation
At the confirmation stage, make sure that the plan has been published.
You'll be notified whether it will be visible from the application, or not.
Make sure that all options (including the eye) are checked and highlighted in green.
Program visibility from the customer's calendar
Find out more in this article.