Probleme with user connection

I’ve a synologie nas
All of my user (50) can connected to my nas with raidrive without problem, BUT a new user cant being connected.
raidrive raison 401 unauthorized. I dont know why

Anyone know how to fix it ?

Hi~ @L_C ,

Usually 401 error occurs when ID/PW is entered incorrectly. If you have entered the correct IP/PW, please make sure the Synology server’s address or port is correct. It is also recommended to temporarily turn off virus scans and anti-virus software and try again. You should also check the NAS admin page to see if the IP you are using is blocked.