1. From Community Builder, click the Settings icon , and select General.
2. Click the link for the profile name under Guest User Profile.
3. Click Edit.
4. Scroll down to the Standard Object Permissions section.
5. On the Cases object, select Read andCreate.Note Are you using more than one case record type in your org? If so, don’t usethe Master Record Type as the Assigned Record Type or the Default RecordType on the guest user profile.
6. Scroll down to Article Type Permissions and select Read for the articles you’ll display in your community.
7. Scroll down to Category Group Visibility Settings.
8. Click Edit next to the Category Group for your community.
9. Select a visibility setting. Visibility SettingDescriptionAll CategoriesUsers can see all categories in the category group. This option is only available for the topmost role in the role hierarchy. When you create a category group, its visibility is defaulted to All Categories.NoneUsers can’t see any categories in the category group.CustomUsers can see your custom selection of categories. For roles, you can choose from the categories that are visible to the parent role. If the parent role's visibility changes to be less than its child's visibility, the child role's category visibility is reset to its parent's category visibility.To select categories, double-click the category in theAvailable Categories box. Alternatively, select a category and then click Add. Selecting a category implicitly includes its child and parent categories as well. Categories that are grayed out are not available for selection because their parent has already been selected. Note If you are customizing a role, permission set, or profile that was set to All Categories, removeAll from the Selected Categories box and then select specific categories.