Xink client version 3.2.6 and later supports Transport Layer Security (TLS) 1.2.
To provide best-in-class encryption Microsoft discontinued the support for TLS versions 1.0 and 1.1 in Office 365. Learn more.
If your Xink client version is 184.108.40.206 or older, please ensure to upgrade this to the latest version.
To find out what is the current version of your Xink Client.
Right-click on the Xink client in the system tray and click on the Xink logo
When you have deployed the Xink client via the unattended (MSI Package), it's not automatically updated, and you should download the latest version from the Xink portal (Preferences > Downloads) and re-deploy it to your end users.
When the Xink client was installed via the email invitation method, it's automatically upgraded (no worries).