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How to: Obtain Availability Information for an Exchange User's Manager

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This example displays the next free 60-minute time slot in the calendar for a user's manager.

This code sample checks whether the current user is an Exchange user. If so, and if the current user has a manager, it obtains the manager's information by calling the GetExchangeUser method of the AddressEntry object and the GetExchangeUserManager method of the ExchangeUser object. The manager's information is contained in an ExchangeUser object that includes the manager's free/busy schedule.

If you use Microsoft Visual Studio to test this code sample, you must first add a reference to the Microsoft Outlook 12.0 Object Library component and specify the Outlook variable when you import the Microsoft.Office.Interop.Outlook namespace. The Imports or using statements must not occur right before the functions in the Code section but must be added before the public Class declaration. The following lines of code show how to do the import and assignment in Visual Basic and in C#:

using Outlook = Microsoft.Office.Interop.Outlook;
private void GetManagerOpenInterval()
    const int slotLength = 60;
    Outlook.AddressEntry addrEntry =
    if (addrEntry.Type == "EX")
        Outlook.ExchangeUser manager =
        if (manager != null)
            string freeBusy = manager.GetFreeBusy(
                DateTime.Now, slotLength, true);
            for (int i = 1; i < freeBusy.Length; i++)
                if (freeBusy.Substring(i, 1) == "0")
                    // Get number of minutes into
                    // the day for free interval
                    double busySlot = (i - 1) * slotLength;
                    // Get an actual date/time
                    DateTime dateBusySlot =
                    if (dateBusySlot.TimeOfDay >=
                        DateTime.Parse("8:00 AM").TimeOfDay &
                        dateBusySlot.TimeOfDay <=
                        DateTime.Parse("5:00 PM").TimeOfDay &
                        !(dateBusySlot.DayOfWeek == 
                        DayOfWeek.Saturday |
                        dateBusySlot.DayOfWeek == DayOfWeek.Sunday))
                        StringBuilder sb = new StringBuilder();
                            + " first open interval:");