users with negative id numbers

But are you running Joomdle 1.1.3 in Joomla and Moodle? Change username function was added recently... maybe you still have a version without support for it?

hello Antonio,
i use Joomla! 3.7.3 - Joomdle 1.1.3 - Moodle 3.3.1 - Community Builder 2.1.2+

Check fhe functions in your Joomdle service in Moodle to confirm that change_username is there. If it is not,, add it.

Hello Antonio
Thank you very much because it works.
I am a negative user who is a user who only uses joomdle. It is not in joomla nor in moodle:
-1 / guest / Anonymous Visitor / root @ localhost / moodle
Must we keep it or can we delete it?

I still have users with names in uppercase but apparently it does not do double. Do I still have to put them in lower case? If it is yes I will have a lot of work.

Thank you

Hi Raymi, glad it is working now.

Note for anybody reading this: finally problem was missing functions in service.

You don't need to do anything about guest user, as it is a moodle-only system account. Leave it alone.

> I still have users with names in uppercase but apparently it does not do double. Do I still have to put them in lower case?

If they are working fine, I don't think so.