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Attendees receive a meeting cancellation followed by a meeting update shortly before the start time

Symptoms
Consider the following scenario:
  • A meeting organizer creates a meeting that includes one or more external recipients.
  • One or more of the external recipients has a hidden mail contact in the global address list.
  • The organizer closes the reminder on his or her Apple iOS device.
In this scenario, the external attendee receives a meeting cancellation followed by a meeting update that corrects the original cancellation. Internal users may receive an additional meeting update.
Cause
An update to Exchange ActiveSync (EAS) that was intended to improve general protocol functionality exposed a pre-existing issue with the underlying system code, which causes this calendar synchronization issue.
Workaround
Make the hidden contact visible in the global address list by using the Set-MailContact cmdlet. To do this, do one of the following:
  • In Exchange Online, follow these steps:
    1. Connect to Exchange Online by using remote PowerShell. For more information, see Connect to Exchange Online using remote PowerShell.
    2. Run the following command:
      Set-MailContact <alias> -HiddenFromAddressListsEnabled:$False
  • In on-premises Exchange Server 2016 and in an Exchange hybrid environment, open the Exchange Management Shell, and then run the following command:
    Set-MailContact <alias> -HiddenFromAddressListsEnabled:$False
You can also work around this issue by using Microsoft Outlook for iOS.
Status
Microsoft is researching this issue and will post more information in this article when the information becomes available.
More information
For more information about the Set-MailContact cmdlet, see go to Set-MailContact.
Properties

Article ID: 3165413 - Last Review: 05/31/2016 20:51:00 - Revision: 2.0

Microsoft Exchange Online, Exchange Server 2016 Enterprise Edition, Exchange Server 2016 Standard Edition

  • kbsurveynew o365 KB3165413
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