无需验证即可获取Office365电子邮件的日历

Question

I want to get list of events of particular users lets say user@company1.com , user@company2.com which uses office365 accounts.

I need to retrive user@company2.com calendar with out login. My application will be like listing my available timings for my clients , so that they can select my free time and will schedule meeting with me. I need to filter the already scheduled events from my list... Is there any example code for getting calendar events without login??

I tried office365 multi-tenant application which will gives sample code for getting calendar events only after login. I need it with out authentication. Please help me on this.

Answer 1

Trying to access the O365 information without authentication is impossible , either user authentication or app authentication will be required . In your scenario ,you may need app authentication . You could try to build Daemon or Service Apps using client credential grant flow as described in this blog , the service app that requires admin consent, but is authorized to access any mailbox/calendar information in your Office 365 tenant.

Another choice is to use EWS Managed API, you could get free/busy information of a user and suggested meeting times by using the EWS Managed API :

https://msdn.microsoft.com/en-us/library/office/dn643673(v=exchg.150).aspx

And an existing Office add-in support on Outlook:

https://findtime.microsoft.com/

Answer 2

Finally I tried to use the free/busy code. My code is as follows... I am following this procedure but I don't know if it is correct or not. I have a Microsoft Office 365 account, and by passing credentials silently, I am creating Exchange Server service. After that i am passing different domain attendee information as ORGANIZER and REQUIRED as follows. But it is returning all values not skipping any scheduled meetings for those users.

Lets assume user1@domain.com is ORGANIZER and user2@anotherdomain.com is REQUIRED for meeting . User1 have meeting scheduled at 7:00-7:30pm on daily basis but when I executed the following script it shows me 7:00-7:30pm as available for meeting. It supposed to block that time.

Can you suggest some changes to code and am I proceeding in the correct way?

private static void GetSuggestedMeetingTimes(ExchangeService service)
{


    List<AttendeeInfo> attendees = new List<AttendeeInfo>();

    attendees.Add(new AttendeeInfo()
    {
        SmtpAddress = "user1@mydomain.com",
        AttendeeType = MeetingAttendeeType.Organizer
    });

    attendees.Add(new AttendeeInfo()
    {
        SmtpAddress = "user2@anotherdomain.com",
        AttendeeType = MeetingAttendeeType.Required
    });

    // Specify options to request free/busy information and suggested meeting times.
    AvailabilityOptions availabilityOptions = new AvailabilityOptions();
    availabilityOptions.GoodSuggestionThreshold = 49;
    availabilityOptions.MaximumNonWorkHoursSuggestionsPerDay = 0;
    availabilityOptions.MaximumSuggestionsPerDay = 40;
    // Note that 60 minutes is the default value for MeetingDuration, but setting it explicitly for demonstration purposes.
    availabilityOptions.MeetingDuration = 30;
    availabilityOptions.MinimumSuggestionQuality = SuggestionQuality.Good;
    availabilityOptions.DetailedSuggestionsWindow = new TimeWindow(DateTime.Now.AddDays(1), DateTime.Now.AddDays(2));
    availabilityOptions.RequestedFreeBusyView = FreeBusyViewType.FreeBusy;

    // Return free/busy information and a set of suggested meeting times. 
    // This method results in a GetUserAvailabilityRequest call to EWS.
    GetUserAvailabilityResults results = service.GetUserAvailability(attendees,
                                                                     availabilityOptions.DetailedSuggestionsWindow,
                                                                     AvailabilityData.FreeBusyAndSuggestions,
                                                                     availabilityOptions);
    // Display suggested meeting times. 
    Console.WriteLine("Availability for {0} and {1}", attendees[0].SmtpAddress, attendees[1].SmtpAddress);
    Console.WriteLine();

    foreach (Suggestion suggestion in results.Suggestions)
    {
        Console.WriteLine("Suggested date: {0}\n", suggestion.Date.ToShortDateString());
        Console.WriteLine("Suggested meeting times:\n");
        foreach (TimeSuggestion timeSuggestion in suggestion.TimeSuggestions)
        {
            Console.WriteLine("\t{0} - {1}\n",
                              timeSuggestion.MeetingTime.ToShortTimeString(),
                              timeSuggestion.MeetingTime.Add(TimeSpan.FromMinutes(availabilityOptions.MeetingDuration)).ToShortTimeString());



        }
    }

    int i = 0;

    // Display free/busy times.
    foreach (AttendeeAvailability availability in results.AttendeesAvailability)
    {
        Console.WriteLine("Availability information for {0}:\n", attendees[i].SmtpAddress);

        foreach (CalendarEvent calEvent in availability.CalendarEvents)
        {
            Console.WriteLine("\tBusy from {0} to {1} \n", calEvent.StartTime.ToString(), calEvent.EndTime.ToString());
        }

        i++;
    }