LDAP authentication problem

Hello,
I use LDAP (AD 2012 R2) authentication on my rocket chat server, during a connection with a user (ex: toto75v), the connection succeeds but in users rocket chat the user appears like this (foo.75.v) what should you do?
cordially

Server Setup Information

  • Version of Rocket.Chat Server:

Rocket.Chat

Version 1.0.3
Apps Engine Version 1.4.2
Mise à jour de la base de données 144
  • Operating System: Linux
  • Deployment Method: Snap
  • Number of Running Instances: 1
  • DB Replicaset Oplog:
  • NodeJS Version: v8.11.3
  • MongoDB Version: 3.4.20