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On occasion, you might want to invite a guest blogger to participate in your blog. However, you don't want this blog author to have permission to other blogs in the system.
There are two options for solving this problem:
The first option is to simply add the person as an author of the blog temporarily. In this case, the user has permissions to access all posts within the given blog.
Another solution is to Configure a mirrored blog feed. This enables your blog to aggregate content from another blog and show its posts within your blog. For example, a blog called "Industry News" could add a mirror for a blog called "Guest Blogs." Posts made to Guest Blogs would be shown in the Industry News blog, but authors of Guest Blogs would not have permission to control content on the Industry News blog.