Hello,
@mgusta
I had a similar experience and was confused until I read this:
If a URL that is included in an external dynamic list is also included in a custom URL category, or Block and Allow Lists , the action specified in the custom category or the block and allow list will take precedence over the external dynamic list.
found in https://www.paloaltonetworks.com/documentation/81/pan-os/pan-os/url-filtering/use-an-external-dynamic-list-in-a-url-filtering-profile
Since I had custom URLs for Office365 already, the Minemeld EDL feed did not take precidence. To facilitate the migration, I had to add my prexisting custom URL categories (where overlap occurred) to the allowed URL Filtering Policy rather than "block" for all.
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