With this awesome script, you can read Active Directory group membership and convert that information into a CSV file, which can be imported in Microsoft Excel.

The file will be saved inside C:\Temp. The result looks something like this (I'm no Excel wizard):

https://github.com/ajnik/AD-Group-Membership-to-Excel/blob/main/AD-Groups-To-CSV.ps1

Note: Not my script. Check credits.