Licences

Rewritten-docs.md

@@ -2333,7 +2333,18 @@ appear in "Groups hierarchy" box at the top of the page.
 
 ### Licenses
 
-@todo: licenses
+On the instance details page, there is a box "Licences". On the first line, it
+shows it this instance has currently valid licence or not. Then, there are
+multiple lines with all licences assigned to this instance. Each line consists of
+a note, validity status (if it is valid or revoked by superadministrator) and
+the last date of licence validity.
+
+A box "Add new licence" is used for creating new licences. Required fields are
+the note and the last day of validity. It is not possible to extend licence
+lifetime, a new one should be generated instead. It is possible to have more
+than one valid licence at a time. Curretly there is no user interface for
+revoking licences, this is done manually by superadministrator. If an instance
+is to be disabled, all valid licences have to be revoked.
 
 
 ## Superadministrator