UST is failing to build a Group work list when adobe_groups are not provided in mapping section

[cbalanoiu]

Description
UST is failing to build a Group-work-list after the LDAP read when no adobe_groups are configured in the mapping section in user-sync-config.This results in no new users created and no entitlement changes being applied.

Steps to reproduce

• Relevant config options
  users mapped
  adobe-users all
  process-groups
• Command-line options used
  user-wync.exe
• group mapping:
  • directory_group: "any_directory_group"
    adobe_groups:

Expected behavior
This was discovered via an upgrade from 2.6.2 to 2.9.1
It was working in 2.6.2 with the same config so it should continue to work with 2.9.1

workaround
Add "dummy" blank Admin Console groups with no actual entitlement.
Adding ghe Admin Console groups to the mapping actually fixes the issue.

Environment

• UST version: 2.9.1
• OS type and version: Win Server 2019 Standard
• Any other relevant info:

2023-11-20 06:00:22 4460 DEBUG ldap - Total users loaded: 25572
2023-11-20 06:00:22 4460 DEBUG processor - Total directory users after filtering: 25572
2023-11-20 06:00:22 4460 DEBUG processor - Group work list: {}

[cbalanoiu]

@adorton-adobe
I have another customer that is stuck with the same issue.
They have updated to OAuth and previously were running UST 2.7 with no groups which was working fine.
Without a working 2.9.1 they cannot update to OAuth without using groups.

Is this going to be fixed or is this the new expected behaviour?