Sharing your calendar within a department or team

Hi Bart, the best way to share availability to colleagues is to use the "My organization" user (previously known as Default user). This is the default level of permissions that others in your organization will have when viewing your primary calendar availability in tools like Scheduling Assistant. Most companies will set this permission level by default when creating mailboxes, so that the default within the company is to share only free/busy information. You can also run a script to set it for existing mailboxes. With this approach, you won't have to setup security groups or asks users to manage membership. In your post, you mentioned that they only want to share with certain groups of people, but I'd be interested to know if your users are against sharing their availability to everybody in the company. Certainly makes scheduling a lot easier, and not having to manage lots of groups is a positive as well.