Board Thread:Support Requests - Getting Technical/@comment-180408-20180525160948/@comment-26402117-20180529113210

You can generate a wiki-wide notice in Oasis by placing it in MediaWiki:Communitymessages-notice-msg then making some edit to the MediaWiki:Community-corner page.

There is also w:c:dev:WikiaNotification if you prefer a cleaner approach.