In the email that opens, type the email address for the person outside of your organization that you want to share your calendar with in the To box. In Details, specify the level of details that you want to share with the person outside of your organization, and then click Send.
If the following error displays when you try to send your sharing invitation, you have tried to share more details than is supported by the settings in your organization. If this occurs, under Details, choose to share a different level of details. Only an admin in your organization can change the sharing policy settings for your organization. For more information, see the end of this section.