ACF2 LID Length and Naming Convention

Products

• ACF2 - z/OS
• ACF2
• ACF2 - MISC

Issue/Introduction

What are the restrictions for the length of an ACF2 user's LID? Does TSO still restrict the logonid to be 7 characters? Are there any other restrictions such as the LID must start with a character, etc.?

Environment

Release : 16.0

Component : ACF2 for z/OS

Resolution

An ACF2 LID can be up to 8 characters. The previous TSO restriction of 7 character userids ended in z/OS 2.3

ACF2 itself will accept almost any character in a logonid, but the character also has to be acceptable to the application. For example, TSO and MVS require that the first character of user IDs be either uppercase A - Z, # (X'7B'), $ (X'5B'), or @ (X'7C'). Most applications conform to the TSO/MVS standards, so the national characters # (X'7B'), $ (X'5B'), and @ (X'7C') should be the only special characters specified for the LID.