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Introduction
Microsoft 365 continues to evolve with critical updates, retirements, and security enhancements. The June 2025 changes introduce new features like OneDrive file ownership transfers and shared mailbox support while retiring legacy functionalities. IT admins must adapt to these changes to maintain security and efficiency.
Learning Objectives
- Understand key Microsoft 365 security and functionality updates for June 2025.
- Learn PowerShell and admin commands to manage new features.
- Implement best practices for OneDrive file transfers and shared mailbox configurations.
You Should Know
1. Simplified OneDrive File Ownership Transfer
PowerShell Command:
Set-SPOUser -LoginName "[email protected]" -NewLoginName "[email protected]" -NoSiteCollectionAccess
Step-by-Step Guide:
1. Open PowerShell with admin rights.
2. Connect to SharePoint Online:
Connect-SPOService -Url https://domain-admin.sharepoint.com
3. Run the ownership transfer command to migrate files while preserving sharing permissions.
4. Verify the transfer in the Microsoft 365 Admin Center under Active Users.
2. Configuring Shared Mailboxes in New Outlook
PowerShell Command:
Add-MailboxPermission -Identity "SharedMailboxName" -User "[email protected]" -AccessRights FullAccess
Step-by-Step Guide:
1. Open Exchange Online PowerShell.
- Grant a user access to the shared mailbox.
- In New Outlook for Windows, click File > Add Account and enter the shared mailbox email.
4. Verify access under Account Settings.
3. Auditing Microsoft 365 Changes with PowerShell
PowerShell Command:
Search-UnifiedAuditLog -StartDate "06/01/2025" -EndDate "06/30/2025" -Operations "FileAccessed,FileModified"
Step-by-Step Guide:
1. Connect to Exchange Online PowerShell.
- Run the audit log search to track file access and modifications.
3. Export results to CSV for analysis:
Search-UnifiedAuditLog -StartDate "06/01/2025" -EndDate "06/30/2025" | Export-Csv -Path "C:\AuditLogs.csv"
4. Disabling Legacy Non-Profit Grant Offers
PowerShell Command:
Set-MsolCompanySettings -AllowAdHocSubscriptions $false
Step-by-Step Guide:
1. Connect to Azure AD PowerShell:
Connect-MsolService
2. Disable ad-hoc subscriptions to enforce licensing compliance.
- Verify changes in the Microsoft 365 Admin Center > Billing > Licenses.
5. Hardening Microsoft Teams Security
PowerShell Command:
Set-CsTeamsMeetingPolicy -Identity Global -AllowAnonymousUsersToJoinMeeting $false
Step-by-Step Guide:
1. Connect to Teams PowerShell Module:
Connect-MicrosoftTeams
2. Disable anonymous meeting joins to prevent unauthorized access.
3. Apply the policy globally or per-user.
What Undercode Say
- Key Takeaway 1: The new OneDrive ownership transfer feature reduces administrative overhead but requires proper auditing to prevent data leaks.
- Key Takeaway 2: Shared mailbox support in New Outlook improves productivity but must be configured with least-privilege access controls.
Analysis:
Microsoft’s June 2025 updates emphasize security and usability, but IT teams must proactively manage these changes. PowerShell remains essential for automation, while deprecated features (like non-profit grants) require immediate action. Organizations should audit permissions, enforce MFA, and monitor audit logs to mitigate risks.
Prediction
Future Microsoft 365 updates will likely integrate deeper AI-driven security policies, such as automated threat response in Exchange Online and adaptive access controls in Entra ID. IT admins must stay ahead by mastering PowerShell and cloud security best practices.
For full details on the June 2025 updates, visit: Microsoft 365 Updates.
IT/Security Reporter URL:
Reported By: Https: – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
