Sam asked to add janelle@kylawoffice.com to intake@kylawoffice.com and newleads@kylawoffice.com.
I verified the tenant live through Microsoft Graph and Exchange Online before and after the change. Janelle Aguiar resolved as an active user with UPN Janelle@kylawoffice.com and object ID 024ead5a-6a50-4b49-b5da-b49642de3242.
Intake@kylawoffice.com resolved as a Microsoft 365 Unified group named Intake, object ID ae38aa63-c476-43eb-bd41-e586156fcf44. Janelle was added and verified as both a member and subscriber, which matters for mail delivery.
newleads@kylawoffice.com did not exist as a literal recipient. Exchange Online confirmed the live target is a mail-enabled distribution group named New Leads, primary SMTP SAILNewLeads@kylawoffice.com, external directory object ID 92bcd62a-e171-44f6-a77e-d87429bdf334. Graph correctly refused the distribution-list membership update with Cannot Update a mail-enabled security groups and or distribution list, so I switched to Exchange Online app-only PowerShell. Janelle was added and verified as a member.
Sam approved the QA recommendation to preserve the workflow. I created Skills/microsoft-tenant-operations/SKILL.md and indexed it in Skills/SKILL-INDEX.md.
The new skill documents:
The requested membership updates are complete, verified live, and the approved workflow improvement has been captured in a durable skill note.
A future agent can treat the mailbox membership work as done. For similar Microsoft tenant membership tasks, load microsoft-tenant-operations before acting, then verify the recipient type and choose Graph or Exchange based on the live object type.
Useful facts for a future agent: