Summary
The following error message appears when you convert emails to PDF format using Adobe:
The Add-in 'Private Post v4' (C:\Program Files\Trend Micro\Encryption for Email\bin\PPOutl.dll) cannot be loaded and has been disabled by Outlook. Please contact the Add-in manufacturer for an update. If no update is available, please uninstall the Add-in. Out of memory or system resources. Close some windows or programs and try again.

Details
The error is due to the compatibility issue between TMEE and Adobe plug-ins. When the two plug-ins interacts with each other, the error occurs. However, the plug-ins work fine when used independently.
To resolve the issue, close TMEE and disable its plug-ins from Outlook:
- Right-click the TMEE icon from the system tray, and then select Shutdown.
- Enable TMEE.
- Click Start > All Programs.
- Select Trend Micro Encryption for Email.
- Click Tray Tool.
- Disable TMEE plug-ins:
- Open Microsoft Outlook.
- Go to Tools > Trust Center > Add-ins.
- Click Go.
- Look for and take note the file location of Private Post. This information will be used for re-enabling the add-in.
- Remove Private Post.
- Click OK.
To enable again the TMEE plug-in:
- Open Microsoft Outlook.
- Go to Tools > Trust Center > Add-ins.
- Click Go.
- Click Add and locate the file for Add-in.
- Click OK.