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I have created users with the same username and password on both Windows 10 and Mac using the content server. However, when I add a highlight on Windows 10, I notice that the highlight appears in both the local user and content server user in the annotations browser. Meanwhile, on Mac, the annotations of the local user and the content server user are completely independent.

I would like to know which behavior is normal and which one is a bug?

and in addition, How can I delete unnecessary users?

When I delete a user in Preferences, the multiple users in the annotations browser are not deleted. I deleted the unnecessary annotations in the annotations browser, but those users without any annotations were not deleted either.

I can only try to delete the books directly. That works, but it's not an ideal solution considering some books have many annotations.

I also want to know how to share annotations between multiple users.

I use the content server at home for some mobile devices. I created users for the content server, but I seem unable to read the annotations I made on the desktop device. I tried turning off username and password access, but I ended up with an anonymous user, and nothing changed.

Any help would be greatly appreciated.