After upgrade to ACF2 r16 users are seeing a signon screen when connecting to IMS.
Users are being forced to signon whereas previously signon was not required.
Release : 16.0
Component : CA ACF2 for z/OS
The VTAM terminals were not defined under IMS.
That makes it a dynamic terminal.
Dynamic terminals are forced to signon to IMS.
Once the terminals were defined under IMS, they are static.
Static terminals are not forced to sign on to IMS.