CAN MULTI-USERS SIMULTANEOUSLY EDIT A CALENDAR ON OFFICE NETWORK?

[mElAnIe]

WE ARE TRYING TO FIND A WAY TO ALLOW ALL USERS ON OUR NETWORK A WAY TO
ACCESS/EDIT A MASTER DISPATCH SCHEDULE SIMULTANEOUSLY. FREEWARE OR
SHAREWARE IF POSSIBLE, AND WONDER IF OUTLOOK HAS SUCH A FUNCTION-CAN ANYONE
OFFER SUGGESTION OR HELP??