I have a problem with disappearing email messages from Outlook. Scenario: One day user have all emails in his mailbox and suddenly many of these messages revealed to be missing. When user logs via OWA all of the messages are in place (in Outlook they are still not).We have Microsoft Windows SBS 2011 with Outlook (2010-2013) clients. We have about 40 clients but this problem occurs only on a few of them.
I have tried the following:
- Re-configure, re-sync Outlook.
- Reinstall Outlook.