I want to provide an anonymous access to some spaces, but not to the dashboard. I don't want the user to be able to go to the dashboard on the top left of the screen. How can I do?
This is not possible by default.
Perhaps, you can apply a similar customization that is mentioned in this page: https://confluence.atlassian.com/display/CONFKB/How+to+Display+Different+Appearance+for+Different+Users+Using+Confluence+Layouts to workaround what you are trying to chieve.
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