By default only course authors may create entries. Course participants can read them, assess, and comment on them. If you want course participants to create entries by themselves just deactivate the check box "Locked for learners" in the section "Read and Write." Course participants will not be able to edit entries they created. Only course authors or moderators are allowed to make modifications. In the section "Moderate" you determine who will have the right to moderate a blog. This means that a course participant may then edit that blog and delete all entries and comments.
This configuration is only relevant if entries are created within OpenOLAT. When embedding an external blog you cannot determine who will be able to create entries. (see also the information about the blog on the page "knowledge transfer").
Blog: permission to moderate
The access as moderator allows you to read, comment, edit, delete or create entries. Additionally moderators can modify the Feed's title and description.
This access allows you to read and comment existing entries as well as create new ones. Entries once created cannot be modified or deleted later on.
The access as reader allows you to read and comment all published entries. However, you cannot create your own entries.
For more information on the other restriction options, please go to General Configuration of Course Elements.
Course participants can subscribe to a blog via RSS Feed to be informed as soon as there are new entries. Scheduled (unpublished) blog entries will not be considered in the notification.
You can also use course element to include an external blog. Just select "Include an external blog already existing" when editing it for the first time. Indicate the feed link of your external blog in the field "URL." Generally this URL will have an .xml add-on. Entries of that external blog will appear in your course element.
Once you have decided on what kind of blog you want to embed (create your own entries or include an external blog) you will not be able to modify your choice later on.