Invalid time in the Message sent by the Peer. Please ensure time synchronization between Netscaler and the Peer

Invalid time in the Message sent by the Peer. Please ensure time synchronization between Netscaler and the Peer

I got this error while trying to connect to my Citrix gateway after an Azure AD authentication. The Netscaler were just provisioned on a SDX. The SDX was time sunchronize with my NTP server but something seems odd with this message :

Invalid time in the Message sent by the Peer. Please ensure time synchronization between Netscaler and the Peer

Checking the date on the first Netscaler gave me a totally wrong time.

Getting the current date and time :

date

and then to force a time synchronisation :

ntpdate

Everything should be back to normal and connexion is ok.