Hi @GregBromley , was the user previously connected via VPN and DUO was re-authenticating the user?   I get this when I’m connected into a customers site via VPN.  After a few hours I get a DUO Notification to sign-in again. ... View more

The other option is to access servers via their FQDN.  For example, rather than accessing \\server used \\server.domain.local.   Note, depending on your DNS setup, you may need to use a trailing "." (which turns it into an absolute DNS lookup rather than a relative lookup). ... View more