You can use the policy compare function to give you access to view previous versions of the policy and the changes in the most recent version.
To get started, follow these steps.
Click policies
then click Policy Management.Find the policy you want, then click the three-dot menu.
Click View Policy, then click Compare. You'll to the current on the left, and the previous on the right.
To see previous versions, click the Policy versions drop-down list, then click the version you want to see.
This now shows you the differences to see what has been updated.