Limitations

These are cumulative release notes. If a release does not appear in this section, then there were no associated limitations.

  • 1959197: Due to Microsoft Graph API limitations, when forwarding a calendar event, only recipients added in the To field receive the invitation. Recipients added in the CC or BCC fields are not supported.
    Additionally, when replying, replying all, or forwarding an email with attachments larger than 3 MB, the delegate account must be granted full access permissions through the Exchange Admin Center for the operation to succeed.
  • 1956905: Due to a Microsoft Graph API limitation, recipients may occasionally receive duplicate meeting invitations. This behavior originates from the underlying Microsoft Graph service and is outside the control of Email+.
  • 1917050: Cancelled meeting invitations that are deleted from the server using Outlook may continue to appear in Email+ and are not automatically removed from the app. Users may need to manually remove these cancelled invitations from Email+.
  • 1873280: Microsoft will block connections from devices using Exchange ActiveSync (EAS) versions earlier than 16.1 to Exchange Online starting March 1, 2026. EAS 16.1 was introduced in June 2016 and provides enhanced security and compatibility. Devices and applications that continue to use older EAS versions will no longer be able to connect to Microsoft Exchange Online services after this date.
    Workaround: If your environment uses an EAS version earlier than 16.1, upgrade your devices and applications to EAS 16.1 or later to ensure uninterrupted access to Exchange Online services.
    For more information, see Exchange Online ActiveSync device support update.

  • 1871768: For delegated calendars, Reply and Reply All actions create a new message instead of maintaining the original email conversation thread. This behavior is due to a Microsoft Graph API limitation, which does not support Reply and Reply All operations with the original thread context.
    Additionally, attachments added to these messages are not reflected in the associated calendar events because the messages and events are not linked.

  • 1862305: Reply, Reply All, and Forward actions cannot be performed from Direct Messaging.
    Workaround: With additional folder permissions (such as Sent Items and Drafts), Reply, Reply All, and Forward actions can be performed from Direct Messaging.

  • 1851669: Previously, delegated users without Manage full access permission were unable to upload large files due to a known Microsoft limitation related to Events. Large file uploads with Events now require the permission from AdminCenter.
  • 1849643: Replies, reply-all messages, and forwarded emails sent by a delegate user are displayed only in the main user Sent folder.

  • 1849606: When delegated mailbox or calendar permissions are changed (for example, from Editor to Author or vice versa), the updated permissions apply only to newly synchronized emails and calendar events. Previously synchronized items may continue to reflect the earlier permission level.
    Workaround: Remove and re-add the delegated account after the permission change to ensure that the updated permissions are applied consistently across all synchronized content.
    Cancelled meeting invitations that are deleted from the server using Outlook may continue to appear in Email+ and are not automatically removed from the app. Users may need to manually remove these cancelled invitations from Email+.

  • 1689020: On some Microsoft Exchange servers, creating a calendar event with attachments might duplicate both the event and its attachments.

  • 1680707: When Kerberos authentication is used, calendar events with attachments might disappear after the calender view is refreshed.