How to Change Exchange Online Deleted Items Retention Period

Exchange Online, part of Microsoft 365, allows organizations to manage email retention policies effectively. By default, items deleted by users are retained in the Recoverable Items\Deletions folder for 14 days. However, some businesses may need to extend this retention period to the maximum of 30 days to comply with data recovery policies and legal requirements.

This guide provides a step-by-step explanation of how to change the retention period for deleted items in Exchange Online to 30 days using PowerShell commands.

Why Change the Deleted Items Retention Period?

Extending the deleted items retention period can be beneficial for:

• Accidental Deletion Recovery: Provides additional time to recover mistakenly deleted emails.
• Compliance Requirements: Ensures compliance with data retention and legal hold policies.
• Backup Supplementation: Acts as a short-term backup alternative in case of email data loss.
• User Convenience: Allows users more time to retrieve important deleted messages.

Default Retention Policy in Exchange Online

• Default Setting: 14 days.
• Maximum Setting: 30 days.
• Items are moved to the Recoverable Items\Deletions folder when deleted using Delete, Shift+Delete, or Empty Deleted Items Folder actions.

Prerequisites for Changing Retention Period

Before proceeding, ensure the following:

1. Administrative Permissions: You must have Exchange Administrator or Global Administrator privileges.
2. PowerShell Module for Exchange Online: Install and configure the Exchange Online Management module.
3. Multi-Factor Authentication (MFA): Enabled and configured for secure access.

Step 1: Connect to Exchange Online PowerShell

1. Open Windows PowerShell as an administrator.

2. Install the Exchange Online PowerShell module if it is not already installed:

Install-Module -Name ExchangeOnlineManagement

3. Import the module:

Import-Module ExchangeOnlineManagement

4. Connect to Exchange Online:

Connect-ExchangeOnline -UserPrincipalName admin@domain.com

Step 2: View Current Retention Settings

1. Check the current retention setting for a specific mailbox:

Get-Mailbox -Identity user@domain.com | Select RetainDeletedItemsFor

2. Review the output to confirm the current retention period in days.

Step 3: Change Retention Period to 30 Days

For a Single Mailbox:

1. Update the retention period for one user:

Set-Mailbox -Identity user@domain.com -RetainDeletedItemsFor 30

For All Mailboxes:

1. Apply the change across all mailboxes:

Get-Mailbox -ResultSize Unlimited | Set-Mailbox -RetainDeletedItemsFor 30

2. Confirm that changes are applied successfully.

Step 4: Verify Changes

1. Check the updated setting for the mailbox:

Get-Mailbox -Identity user@domain.com | Select RetainDeletedItemsFor

2. Ensure the output shows 30 days.

Common Errors and Troubleshooting

1. Permission Denied Error

• Cause: Insufficient administrative rights.
• Solution: Ensure the logged-in user has Exchange Administrator or Global Administrator permissions.

2. Retention Period Not Updated

• Cause: Command execution failed or mailbox not recognized.
• Solution: Double-check mailbox identity and rerun the command.

3. PowerShell Module Not Installed

• Cause: Exchange Online Management module is missing.
• Solution: Install the required module using:

Install-Module -Name ExchangeOnlineManagement

Best Practices for Managing Deleted Items Retention

• Regular Audits: Periodically review retention settings to ensure compliance.
• User Education: Train users to recover deleted items effectively.
• Backup Planning: Combine retention policies with regular backups for added protection.
• Retention Tags and Policies: Implement retention tags for automated cleanup and compliance.

Benefits of Extending Retention Period

• Data Protection: Safeguards against accidental or malicious deletions.
• Compliance Support: Helps meet regulatory requirements for data retention.
• Cost Efficiency: Reduces dependency on third-party email archiving tools.
• Simplified Recovery Process: Allows IT admins to recover items without contacting support.

Conclusion

Changing the Exchange Online deleted items retention period to 30 days provides enhanced security, compliance, and recovery options for organizations. By following the steps outlined above, administrators can easily modify retention policies using PowerShell commands.

For professional assistance with Microsoft 365 configurations, email retention policies, and Exchange Online management, contact Medha Cloud today.

Contact Medha Cloud to optimize your Microsoft 365 setup.