| CPC G06F 21/31 (2013.01) | 15 Claims |

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1. A time/date adjustment apparatus comprising:
an authentication unit configured to perform authentication processing with an external system managing schedule information of a belonging member belonging to an organization being a member of the time/date adjustment apparatus;
an adjustment condition setting unit configured to set an adjustment condition related to an assembly; and
a time/date adjustment unit configured to adjust an assembly time/date based on the adjustment condition, wherein
the authentication unit performs first authentication processing with the external system, by using an administrator privilege account of the external system,
after the first authentication processing succeeds, the authentication unit acquires belonging member information managed by the external system from the external system by using the administrator privilege account, the belonging member information including information that is not allowed to be acquired using an account not having an administrator privilege of the external system,
the adjustment condition setting unit sets the adjustment condition including a participant in the assembly selected out of a belonging member list based on the belonging member information, based on an input of an adjustment initiator being the belonging member of the organization and a user of the time/date adjustment apparatus,
when an adjustment partner performs access based on access information, the time/date adjustment unit refers to the schedule information of the participant managed by the external system, and extracts candidate time/dates that are available time/dates of the participant satisfying the adjustment condition,
the time/date adjustment unit causes a second terminal apparatus used by the adjustment partner to display a time/date adjustment screen presenting the extracted candidate time/dates, and determines the assembly time/date out of the extracted candidate time/dates, based on a selection operation of the adjustment partner on the time/date adjustment screen, and
the time/date adjustment unit registers the determined assembly time/date in the schedule information of the participant managed by the external system.
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