When issuing an Exchange Web Services GetFolder request to a public folder mailbox hosted in Office 365 Exchange Online, the TotalCount returned in the response may incorrectly show a value of 0.
Office 365 Exchange Online engineering have confirmed this as a known architecture limitation that we are not planning on addressing at this point in time. The problem occurs because the public folder hierarchy and content are stored in separate mailboxes.
To work around this limitation, we recommend you include the PR_CONTENT_COUNT
in the requested set of properties, as an ExtendedFieldURI
. The property tag to include is PropertyTag="0x3602" and the property type is PropertyType="Integer".
This content will soon be published as a support.microsoft.com KB article. We will update this post with the KB number as soon as available.