Find the record you wish to share by searching for your record in the search bar.
When you have found your record, select the share icon and a pop-up will appear.
A list of your colleagues will be displayed and you can click the plus icon to share with individuals. In this example I have selected one colleague (Aydin Sullivan) to share my calendar with. This 
indicates that he is only able to view my record .
Should I click on 
this will turn to green 
and he will also be able to edit my record.
If you wish to remove an individual, click the minus icon .
Don’t forget to click Share to save your changes.