How do I modify Schedule/Calendar permissions?
Go to Schedule.
Select the Schedule tool from the Tool Menu in your site. (Remember that it may also be called Calendar.)
Click the Permissions button.

Modify the permissions for the roles listed.

- Check the box next to each permission you would like to allow for a given role. (Deselecting a box will remove the corresponding permission.)
- Click Save to save your changes.
Note: You may see different roles listed depending on the roles which exist in your site. A role must be present in the site in order for you to modify its permissions.