Merge pull request #8015 from nextcloud/backport/8014/stable23

[stable23] Warn about disabling encryption without decrypting all the files

admin_manual/configuration_files/encryption_configuration.rst

@@ -267,10 +267,14 @@ maintenance mode, and then disable your encryption module with this command::
 
  occ maintenance:mode --on
  occ encryption:disable
- 
+ occ encryption:decrypt-all
+
 Take it out of maintenance mode when you are finished::
 
  occ maintenance:mode --off
+ 
+.. warning:: Disabling encryption without decrypting all the files will lead to decryption errors in the future as this state causes unpredictable behaviors.
+.. note:: The ``occ encryption:decrypt-all`` can take a lot of time. You can run one user at a time like so: ``occ encryption:decrypt-all <user-id>``.
 
 Files not encrypted
 -------------------