Outlook 2010 and Microsoft Exchange provide the ability to share calendars between users. Follow these instructions to either allow other access to your calendar, or open a calendar you have been given access to.
The easiest way to share your calendar is to open your calendar, click Folder, and click Share Calendar:
Figure 1: Share calendar command on Folder Ribbon
Now, complete the Sharing Request and click Send:
Figure 2: Sharing invitation
To complete the process, click Yes:
Figure 3: Calendar sharing approval
Here is what you will see if you receive a sharing request:
Figure 4: Calendar sharing request message
If you click Allow, you will be asked to confirm the sharing request:
Figure 5: Prompt to share calendar
When your sharing request has been approved, you will receive a notification email like this:
Figure 6: Open another calendar command
If we click the "Open this Calendar" link, we will see the user's calendar side-by-side with ours:
Figure 7: Outlook calendar view with multiple calendars open
Shared calendars allow you to create a new appointment in the form of a meeting request, which means that they will have to confirm their attendance.
Shared calendars stay in your Calendars list in a Shared Calendars section. To show or hide a calendar, check or uncheck the appropriate box:
Figure 8: Navigation pane calendar options
In order to set more specific permissions for your Calendar go to Calendar > Folder > Calendar Properties.
Figure 9: Calendar properties command, to set calendar permissions
The Calendar Properties will appear, select the Permissions tab.
Figure 10: Calendar properties
Here you are able to set very specific Permissions for each user you wish to have access to your Calendar. You are also able to Add-Remove user access from this screen.
To add a user and assign permissions click Add.
You will be presented with the GAL (Global Address List). Select the user you wish to grant access to and click Add.
Figure 11: Global address list – address book
In this example I will now assign Prospector Pete to have Publishing Editor over my Calendar.
Figure 12: Set permissions - properties dialog
By choosing the Publishing Editor option from the drop down menu you will see some items are automatically selected granting and restricting certain forms of access.
Figure 13: Set permissions - properties dialog
Please note: You do not have to use one of the pre-assigned permission levels; you may assign your own custom level of permissions using the check boxes provided.