Item DisplayCc Auto Become NULL In Exchange

Trinh Van Qui 21 Reputation points
2022-12-12T10:12:10.867+00:00

Hello everyone
I apologize about my English.

I have developed an application using ews calendar.
From my app I subscribe to a new event.
For soap information, please refer to Figure 1 in the attached file.

After successfully registering the event for about 2 minutes, I get the latest information about local.
For soap information, please refer to Figure 2 in the attached file.

The returned results are as shown in Figure 3 in the attached file.
Item DisplayCc is not NULL.

However, after about 10-15 minutes I get the event information again, the DisplayCc item becomes NULL again.

Although I have spent a lot of time researching, I still don't know.

Please help.

Exchange | Exchange Server | Development
Exchange | Exchange Server | Management
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Accepted answer
  1. Glen Scales 4,446 Reputation points
    2022-12-13T21:02:00.97+00:00

    Why are you using DisplayCc ? in a Calendar appointment To = RequiredRecipients CC = Optional and BCC = Resources so for the information you need should always be in the strongly typed properties for https://learn.microsoft.com/en-us/exchange/client-developer/web-service-reference/optionalattendees

    What your seeing with the DisplayCc is probably caused be the calendar Attendant making changes probably because of the privacy policy eg https://learn.microsoft.com/en-us/exchange/recipients-in-exchange-online/manage-resource-mailboxes.


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