In Assure Client z/OS installations, the TLS version is taken from the system's default TLS setting. This will cause issues where TLS 1.2 is required and the mainframe system default is not set to TLS 1.2.
To have Assure Client override the TLS version with TLS 1.2, open your JCL that specifies java options. By default this is ASSURESH within the ASSURE.PROCLIB.
Near the bottom of the JCL, add the following line within the java options:
IJO="$IJO -Dcom.ibm.jsse2.overrideDefaultProtocol=TLSv12"
The updated JCL will look like the following:
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