Issue Summary

Adding a user to a Jira guest group is not sufficient for guest access to work. For the system to recognize a user as a guest, every guest group must be manually marked as the default guest role group - otherwise users are not recognized as guests and experience unexpected behavior (e.g., being redirected to the JSM Service Portal instead of their assigned project).

Steps to Reproduce

1. Current behavior — additional manual steps required after creating a guest group:
   1. Go to admin.atlassian.com → Apps → Atlassian apps
   2. Search for the site, locate Jira → click Manage app
   3. Find the guest group → click ⋯ → Update default setting → set as default

This must be repeated for every guest group, including future ones.

Expected Results

The default setting should be applied automatically when a group is assigned the guest role - no separate manual action should be required.

Why this is a problem:

• This is a known limitation (to reduce Identity service traffic) but is not documented publicly

• The public docs (Manage guest access in Jira, Invite guests to Jira) make no mention of this required step

• Admins following the documented process end up with broken guest access and no clear error or guidance

Workaround

Update the default setting manually.