Emails missing from Shared Mailbox
Published: Wednesday, 20 June 2018 | Categories: Office 365 | Keywords: Exchange | Status: Posted | Created: Wednesday, 20 June 2018 | Author: paul

Users reporting email sent to Shared Mailbox missing when accessed from Outlook.

When a message is marked with sensitivity "Private" they are not downloaded to Outlook when accessing a Shared Mailbox with full access permission. This is due to being unable to select the view private option when adding full access permission in the Exchange admin center.

The workaround is to access the Shared Mailbox using Outlook Web Access or create a mail transport rule to remove the private flag before it is delivered to the mailbox.

Creating mail transport rule

  1. In Exchange Admin Center under "mail flow" select "Create a new rule..."
  2. In "Do the following..." select "Set the message header to this value..."
  3. Set the message header "Sensitivity" to the value "normal"
  4. Save it


Now emails that match the rule get the "Private" flag removed. Making them accessible from the Outlook client.

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