How can we set custom icons for activities?
Step 1. Developer mode
General settings > activate developer mode
Step 2. Create a new activity type (or edit an existing one]
Settings > technical menu > select “activity types” > new > fill in the necessary fields following the general documentation for activities [link]
Step 3. Add the icon key
Check the available icons at https://fontawesome.com/v4/icons/ > select one > copy the key (fa-…) > paste it in odoo
Done 
