As per the issue description mentioned above, outlook crashes when Acrobat add-in is enabled, is that correct?
Could you try following troubleshooting steps:
1- Check if an update is available for Acrobat using "Check for updates" option under "Help" menu, reboot the machine after installing update and try again.
2- -If that doesn't work , try repairing Acrobat using "Repair installation" option under Help menu, ( for Windows OS only), reboot the machine after repair and check.
You may also refer to the following forum thread discussing the similar issue: