In Windows 10 Settings > Account > Email & accounts I added 3 accounts: Exchange, Office 365 and Google. I wrote an app to access the calendars related to these accounts, when and I inspect the properties of AppointmentCalendar I found that for Exchange the value of property AppointmentCalendar.SyncManager is Windows.ApplicationModel.Appointments.AppointmentCalendarSyncManager for Office 365 and Google the property AppointmentCalendar.SyncManager is null What I would like to know is why there is this difference? Is something coded in Windows or in UWP? Or there is something coded in Exchange, Office 365 and Google?

AppointmentCalendar.SyncManager value for different Accounts

Daniele 1,996

In Windows 10 Settings > Account > Email & accounts I added 3 accounts: Exchange, Office 365 and Google.

I wrote an app to access the calendars related to these accounts, when and I inspect the properties of AppointmentCalendar I found that

for Exchange the value of property AppointmentCalendar.SyncManager is Windows.ApplicationModel.Appointments.AppointmentCalendarSyncManager
for Office 365 and Google the property AppointmentCalendar.SyncManager is null

What I would like to know is why there is this difference? Is something coded in Windows or in UWP? Or there is something coded in Exchange, Office 365 and Google?

Richard Zhang-MSFT 6,936 Reputation points

2020-05-04T04:05:06.54+00:00

Hi, Return null, indicating that the current account does not have a manager that can be used to synchronize records, which may be caused by insufficient application permissions.
The mailbox you add in "Email and Account / Accounts used by email, calendar, and contacts" can only be used by specific system applications.
Daniele 1,996 Reputation points

2020-05-04T07:34:31.157+00:00

which may be caused by insufficient application permissions

OK, but why? Why my app (that by the way declares <rescap:Capability Name="appointmentsSystem"/>) has enough permission with Exchange, but not with Office 365 and Google? Is something coded in Windows 10, in UWP, or in Exchange, Office 365 and Google?
Richard Zhang-MSFT 6,936 Reputation points

2020-05-05T01:50:41.173+00:00

When I tried to call the AppointmentCalendar.RegisterSyncManagerAsync method, I got a permission error. After team discussing, this situation may be caused by different account types. Returning null means that it cannot be accessed. But maybe you can talk about why you need to access SyncManager, maybe there are other ways to achieve your goal.
Daniele 1,996 Reputation points

2020-05-05T06:22:59.25+00:00

That does not answer to the question. There must be in Microsoft somebody that can answer to the question "Why for Exchange there is a SyncManager but not for Office 365 and Gmail?".
The original goal is to use API AppointmentCalendar.SaveAppointmentAsync with an Office 365 account, this API creates appointments with Exchange but not with Office 365 and Google.
Anyway after digging and comparing AppointmentCalendar objects for different accounts, now I want to understand where is coded the difference: in which component in the stack between an UWP app and the calendar account is coded that AppointmentCalendar.SaveAppointmentAsync is null for an Office 365 account?

Is coded in Windows 10?
Is coded in UWP?
Is coded in Exchange, Office 365 and Google?
Richard Zhang-MSFT 6,936 Reputation points

2020-05-08T07:22:55.017+00:00

Hello, sorry for the late reply, I am communicating with the team, if anything news, I will post it here.
Daniele 1,996 Reputation points

2020-05-14T09:29:49.69+00:00

@Richard Zhang-MSFT are there news?
Richard Zhang-MSFT 6,936 Reputation points

2020-05-15T05:34:07.967+00:00

Hello, I'm sorry for the late reply. I haven't got a response yet, I will continue to follow this question, if there is progress I will post it here.
Daniele 1,996 Reputation points

2020-05-25T06:55:01.63+00:00

@Richard Zhang-MSFT are there news?
Richard Zhang-MSFT 6,936 Reputation points

2020-05-26T09:46:44.537+00:00

Hello, sorry to keep you waiting. I have feedback to your internal channel on your question again, and will regularly track the progress of this question, if there is a clear answer, I will post it here.
Richard Zhang-MSFT 6,936 Reputation points

2020-06-10T07:30:47.16+00:00

Hello, sorry for the late reply. After communication with engineer, SyncManager is designed to be used only with Exchange services, and currently cannot be used with other mail services.

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AppointmentCalendar.SyncManager value for different Accounts

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