Frank Swarbrick wrote:
>Is z/OS still limited in all cases to 8 upper case characters?

No. The IBM Directory Server for z/OS supports more than 8 upper case 
character user IDs. That's a standard, included, IBM supported feature in 
the base z/OS operating system.

Bob Bridges wrote:
>MQ, TSO, CICS, IMS - whatever the environment, the ID has to be
>authenticated by RACF (or ACF2, or TSS).

Not as you've written it, no, that's not correct. First of all, user 
authentication isn't necessarily required. However, I and many others 
argue that these systems should at least be authorizing user requests.

TSO/E, yes, that subsystem supports user IDs up to a maximum of 8 
characters. Otherwise, I know that MQ for z/OS and CICS Transaction Server 
for z/OS can authenticate users via LDAP (ideally the IBM Directory Server 
for z/OS) at least in certain contexts. See here for example:

https://www.ibm.com/support/knowledgecenter/SSFKSJ_9.1.0/com.ibm.mq.sec.doc/q127976_.htm

I would have to dig a little deeper with respect to IMS if anyone is 
interested.

Interestingly even the "classic" 3270 z/VSE sign on screen supports "long" 
user ID authentication via LDAP-based sign on, although it requires 
"mapping" to a short user ID under the covers:

https://www.ibm.com/support/knowledgecenter/SSB27H_6.2.0/fa2ad_ovw_ldap_sign-on_process.html

Users don't really have to know all that, though. They just sign on with 
LDAP user ID "AliceCooper1990" (or whatever). Maybe somebody would like to 
submit a Request for Enhancement (RFE) for something similar with TSO/E? I 
don't think IBM provides a "stock" sign on screen with z/OS that'll do 
this.

- - - - - - - - - -
Timothy Sipples
I.T. Architect Executive
Digital Asset & Other Industry Solutions
IBM Z & LinuxONE
- - - - - - - - - -
E-Mail: [email protected]

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