Disable existing rogue O365 tenant accounts (temp.csuchico.edu)



Completed [Completed]

100% complete, updated on Tue 10/3/23 10:18 AM by Craig Bentley

Changed Status from In Process to Completed.
Changed Health from Green to None.
After the very last last wave of deletions, the kept the project open to intake and remediate squawking. There was little squawking, thus concluded little impact. The few customers who provided input were all adressed.


Tue 1/3/23 - Tue 10/3/23
Enterprise Systems
Project and Change Management Office / Information Technology Project Request
Operational / Maintenance Projects / Division of IT Maintenance Operations Projects
None - No health has been set
  • Microsoft O365 - post-migration Requests (Darin Wilt)
Large Project (Generally Over 230 Hours Effort)
Thu 1/12/23 8:09 AM
Mon 4/29/24 2:49 PM
Tue 10/3/23 10:18 AM

Project Details

Divisional VP Support
Does your divisional VP support this request?
Project Urgency
Indicate if there is a mandate or requirement driving this request.
Not mandated or required


There's an existing rogue O365 tenant that was created years ago by students using their @mail.csuchico.edu email addresses to sign up for free Microsoft Office licenses. Unbeknownst to the campus, this activity also allowed them to access other Microsoft services like OneDrive and OneNote and many students took advantage of those services. As part of the mail migration project, we had to remove the mail.csuchico.edu domain from this rogue tenant. To avoid causing data loss for the users of this tenant, we migrated them to a new temp.csuchico.edu domain so they could continue to access their data and services, but we also told them that this tenant would be deprovisioned at some point and they should move to a supported service (either our production csuchico.edu O365 tenant if they have a current campus affiliation, or their own personal service if not).

This project is to transition the existing users to other services and shut down this rogue tenant.

Proposed milestones:
- Identify users who are still using the tenant and what services they are using
- Identify and communicate alternatives to those users and assist them with migrating. For example, if users have OneDrive files, help them either migrate to the production O365 tenant or to a file storage solution that belongs to them (a personal OneDrive, Google Drive, DropBox, Box, or other personal storage solution).
- Disable all existing users and wait an appropriate amount of time
- Delete all disabled users and deprovision the entire tenant

Systems Affected

  1. Microsoft

    This is a post-migration item
    (post O365 migration)