If you are using Confluence Data Center and your administrator has temporarily switched your instance to Data Center Read-only mode, you may notice changes to the behaviour of Community Forums. These behaviours are displayed only while your instance is in read-only mode.
Make Stickyoption is hidden
Lock TopicandMark/Unmark as Topicare hidden
Sticky Topics On Topcheckbox is disabled
Create Forummenu item is hidden
Onboarding pop-up dialogs are not displayed
Remember that you cannot edit or create Confluence pages in read-only mode.