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By default, users are allowed to select only daily leaves. To change this, administrator has to edit vacation type and modify Type of vacation document property. For the process explanation, please check here and here Current users of VM - daily leaves conversions [2.x] and Modifying type of vacation document [2.x].
To request desired type of leave, user has to make proper selection (1) while creating new vacation document and fill corresponding fields (2):
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