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Whilst being logged as an HR group member, please do the below to grant particular user(s):
Access to Vacation's Manager user menu →
Access to Vacation's Manager supervisor menu →
Directly after the add-on installation, such menus menu won't be visible. To get similar view please go to Management (1), access Teams (2). Now you can decide what team you want to create (3). Name should fit its office role (e.g. Service Desk Team)
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