Patent ID: 8010656

Claim:
A method of accessing a calendar, comprising: transmitting to a calendar server, by a calendar requester client of a calendar requester, a first request for access to a calendar of a calendar owner that is stored on the calendar server; transmitting to the calendar requester client, by the calendar server, a grant notice that the first request for access is granted if the calendar requester is included in one of a full access list associated with the calendar owner and a limited time duration access list associated with the calendar owner; transmitting to the calendar requester client, by the calendar server, a first denial notice that the first request for access is denied if the calendar requester is not included in one of the full access list associated with the calendar owner and the limited time duration access list associated with the calendar owner, the calendar server checking the limited time duration access list for inclusion of the calendar requester in response to the calendar server determining that the calendar requester is not included in the full access list; and transmitting a second denial notice to a calendar owner client, by the calendar server in response to transmitting the first denial notice to the calendar requester client, the second denial notice including a second request for access to the calendar of the calendar owner.