| # Calendar integration with external scheduling packages The Calendars and Periods module contains the functionality to make calendars available to external scheduling packages. Project Project uses external scheduling packages for employee planning and equipment planning. The external scheduling package retrieves the calendar data from Calendars and Periods in LN. To list calendars that you want to make available to external packages, use the Calendar Selection for External Scheduling Packages (tcccp0181m000) session. External scheduling packages do not support multiple availability types. For the external scheduling package, LN creates a calendar ID that consists of the following parts: The parent calendars (multilevel). The calendar code. The applicable availability type. In the Calendar Parameters (tcccp0100m000) session, the Calendar Length in ESP field specifies the maximum length of the calendar ID for the external scheduling package. In the Calendar Parameters (tcccp0100m000) session, in the Default Availability Type for ESP field, enter the default value for the availability type for external scheduling packages. To make more availability types available to external scheduling packages, use the Calendar Selection for External Scheduling Packages (tcccp0181m000) session. Related topics Calendars in Microsoft Project To use an external scheduling package |