We have a new guest user. He can log in to our Seafile server in a browser but not using the Seafile client app. When I change his Role to default instead of Guest he can then login both ways. Is not being able to login via the client app a normal limitation of Guest accounts?
This is normal. Have a look at the default role definitions: https://download.seafile.com/published/seafile-manual/deploy_pro/roles_permissions.md