Exchange 2010\Outlook Mail issues

Hi,
I am having some issues with mail disappearing and outlook not updating. The issues are:
When sending an email from Outlook it appears in the sent items for 30 seconds in Outlook and then disappears. It never shows up in OWA The email does send though. If an email is sent via OWA the email appears and stays in both OWA and Outlook. This is
happening in Outlook 2010\Exchange 2010
Updating issues on random folders in Outlook. This is happening on both Outlook 2013 and Outlook 2010 different users with the same Exchange 2010 back end. 
Both users have cached email forced. I have tried rebuilding the mailbox locally.
Cheers,
Zac Avramides

Hi,
Thanks for your detailed information about the symptom.
It seems the issue is more related to the Outlook client since OWA works fine. I suggest we can follow the checkpoints below:
1. Rebuild Outlook profile.
2. Disable any third-party firewall or AV programs.
3. Run Windows in Clean Boot.
4. Run Outlook in safe mode by “Outlook /safe”.
What’s the result now?
Thanks,
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support, contact
[email protected]
Simon Wu
TechNet Community Support

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