Message bodies disappearing in Outlook is a known issue of two commonly used antivirus softwares: AVG and NOD32. It happens like this:

  • A message arrives in the Exchange mailbox and is synchronized with Outlook.
  • The AVG or NOD32 add-in, which is added to Outlook automatically if you have the software installed, deletes the message body.
  • The message is then synchronized with the server, so it is also synchronized with OWA and with wireless devices.

To prevent this from happening, you need to remove the AVG or NOD32 add-in in Outlook. Other antiviruses may also lead to the same Outlook behaviour.

Note: this solution will not restore message texts that have already been deleted. The add-ins mentioned here delete message bodies permanently.

Also, there are other Outlook issues which could be caused by antivirus add-ins. For example, when sending messages they can come back undeliverable with no header.

To remove an add-in:

  1. Outlook 2007: Tools > Trust Center > Add-ins
    Outlook 2010/2013/2016/2019: File > Options > Add-ins
  2. In the Manage field choose COM add-ins and click Go
  3. Highlight an AVG or NOD32 add-in and click Remove

You may also check, whether hardware graphics acceleration is disabled on your machine. To check this, open your Outlook and navigate to File > Options > Advanced > Display.
Make sure that Disable hardware graphics acceleration box is checked.

Note: if you did not notice any antivirus add-ins in your Outlook on Windows, try to see if there are any anti-malware programs on your mobile devices. This will help to locate the issue. Contact support with the information that you have, in case the issue persists.