OPENVMS products support mixed case passwords and mixed case phrases.
Release : 3.2
Component : OpenVMS Enterprise Edition Event Managem
OPENVMS products have no need for mainframe mixed case passwords and passphrase support, these products are non-z/OS products
However, with this being said: the SSH component already supports mixed case passwords. With SSH publickeys, you can specify a mixed case passphrase when creating a public/private key pair. And you can generate such keys on OpenVMS using the SSH keygen utility.
There is a kit available from VMS Software Inc. called Enhanced Password Management that a user can
install and configure that allows mixed case and special characters to be in passwords.
VSI Enhanced Password Management software for VSI OpenVMS Integrity Version V8.4-2L1 and VSI OpenVMS Alpha Versions V8.4-2L2 and V8.4-2L1.
You can download this from their website