Missing Emails

July 28, 2018 | by iaur | posted as Failure, Outlook 365

Scenario: You did migrate from an IMAP mail host to Microsoft 365 and some mails are missing

Method 1:

  • Compare folder size of OWA and OLK (local vs server data)
  • Turning OFF cache mode as well
  • Try searching for the email in OWA and OLK

Method 2:

Try resetting the Outlook view or delete any view filters.

Method 3

  • If you have 64 bit office, you need 64 bit MFCMAPI.
  • Open MFCMAPI, go to Session, Logon
  • Select your profile
  • Double-click on the affected data store.
  • Expand Root – Mailbox
  • Expand Top of Information Store or IPM_Subtree
  • Select Inbox
  • Look for PR_CONTAINER_CLASS in the right pane, double-click on it.
  • Change IPF.IMAP to IPF.Note then click OK to close the dialog.
  • You’ll need to do this to each folder that is affected.

From <https://support.microsoft.com/en-us/help/3050475/you-can-t-view-mailbox-folders-on-an-exchange-activesync-or-outlook-cl>

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