I can't create users with a dot in the middle

in nextcloud I cannot create a user in the following way name.surname I come from owncloud where if I could create a user like this any solution? I use version 18 just installed

Hello @Alex_Andreu_Cases,

just created a user with a dot and works fine for me.
I am on v18.0.3

btw. welcome to the user forums of Nextcloud.

You ignored the support template while filing your topic and so much needed information is missing.
Please all information to help you e.g. environment information (os, db type, version, browser, …)