If a calendar has been shared over your local network from another computer, via the Sharing tab in the Calendar Properties window, the "Add a Shared Calendar" window will enable that calendar to be added to your Calendar List, provided you have sufficient permissions to read or contribute to the shared calendar. The "Add Shared Calendar" window can be displayed by used the "Add Shared Calendar From Local Network" command on the File menu, and will list all shared calendars on the local network which you have permission to access.
Note:
Click here for a step-by-step guide to sharing calendars.

To add one or more of the shared calendars to your Calendar List, check the shared calendar's box and then click OK. After closing the window, the calendar(s) will be added to your list and automatically synced within a few seconds. The shared calendar will automatically sync within 15 seconds whenever a change is detected, and does this quietly in the background. Whenever an event is changed, its timestamp is updated. The program keeps track of the last time it synced, and will detect if any shared events have been modified since the last sync. Only changed events are synced.
When adding a shared calendar where you have "Reader"
permission, the calendar and its event will be read-only. You'll
be able to assign popup reminders and desktop alerts to the
events, for your use only, and also adjust the calendar and
event colors on your computer. You can also open events in the
Event Editor to see their
details. However, making any other changes to the event will not
be allowed, since it is read-only. This will be indicated with a
message at the top of the Event Editor window.

If you need write access to the calendar, ask the calendar owner to add your Windows username to the list of users with "Contributor" permission on the Sharing tab of the Calendar Properties window. With the "Contributor" permission level, you can delete, modify, or add events to the shared calendar. You can also modify the default settings for new events belonging to the shared calendar. The only restriction is that for events you didn't originally create, you won't be able to add email or text message reminders. Only the original creator of an event can set those types of reminders - this prevents the same email or text message from being sent multiple times.
If you have questions that aren't answered here, you can reach our support team at support@vueminder.com. If you're using VueMinder Ultimate you'll have our top priority. Otherwise, we'll reply as soon as all VueMinder Ultimate requests have been completed (and always within 1 business day).