Attention: Continue to maintain information for at least one user ID in the UADS. This allows you to log on to TSO/E if RACF® is not active or the RACF data base cannot be accessed.

• If you decide to delete the UADS entries for most users, you must meet the following conditions:
  1. You have tested the RACF data base to ensure that the conversion was successful.
  2. The SYS1.UADS data set is available when each user logs on to TSO/E for the first time after the conversion. The UADS must be available to obtain a user's current user profile table (UPT), because the conversion does not migrate the UPT to the RACF data base.
• If you decide to delete the SYS1.UADS data set, you must also remove the reference to it in MSTJCL00 in linklib. The SYSUADS DD statement must either be removed or commented out, or your system will not IPL. For information on how to modify MSTJCL00, see .