Of course, if two people share the same computer at different times of the day, they can share data see Sharing Microsoft Outlook Info on One PC. The same problem occurs if two people try to look at the same Personal Address Book. pst file at the same time, because these files are not designed for shared access. However, two people cannot work from the same Personal Folders. One reason that this goal of sharing is so elusive is that standalone users store data in Personal Folders. However, it is much easier now that us hosted on Office 365 Exchange servers. That's right, there's no 'magic wand' you can wave to enable people to easily share Outlook data without Exchange.
For many offices, the most frustrating experience related to Microsoft Outlook is finding out that, unless you are using Microsoft Exchange Server (including ), there is no simple, built-in, reliable method for sharing contacts and calendars.