Hi,
To Access Bot Exclusion Rules, you need to go to Admin > Report Suites.
Choose 1 or Many Report Suites that you want to modify
Then go to Edit Settings > General > Bot Rules
(Adobe May prompt you to choose 1 of the selected suites as your "template")
Standard Bot Exclusion Rules can be applied simply by checking "Enable IAB Bot Filtering Rules"

To add your own custom rules, click "Add Rule", you can create multiple rules:

Hope this helps