Is it possible to rename M-Files users?

You can add Full Name and change the displayed name of "Login Accounts". However, you cannot change Login Account's "username" section once it's created.

ok, thanks. And how to solve it?

Create new Login Accounts with the correct "username". Then, go to the vault -> users section and swap "Login accout" with the new one you created.

The permissions that user have will not be effected as long as you do not create new "user" in Vault -> users section.

Create new Login Accounts with the correct "username". Then, go to the vault -> users section and swap "Login accout" with the new one you created.

The permissions that user have will not be effected as long as you do not create new "user" in Vault -> users section.