Oktopost allows you to mention other LinkedIn Pages on scheduled posts. To mention a page, open the post or message console and start typing the page name using an @ sign, e.g. @Oktopost. You can use the underscore character "_" to indicate a space in the page name, e.g. @Oktopost_example.
As you type in the Page name, Oktopost will automatically attempt to give you matching pages in order to help you find the relevant one.
Note that due to API restrictions you will be able to mention Company Pages only unless a Personal or Showcase Page is connected to your Oktopost Account.