Working with User ID enabled views
I have setup an account and implemented the User ID feature, including passing the user ID through the designated variable as well as a custom dimension and created the user ID view. When I look in the user explorer in the user view, I see all of the user IDs. However when I try to create custom reports using the custom dimension which is also capturing the unique ID number of the users, I see about half as many unique IDs in there. Why would the two be different?