Are you struggling to monitor archived mailboxes in Exchange Online? Having a comprehensive list of archived mailboxes and their details is essential for effective monitoring, as it helps track storage usage and prevent potential data retention issues. In this guide we'll show you how to export a list of Exchange Online archived mailboxes to streamline your storage management.
Windows PowerShell Windows PowerShell 
AdminDroid's Exchange Online auditing tool provides detailed insights into archived mailboxes and helps admins efficiently manage mailbox storage. This powerful monitoring capability helps to track storage usage and maintain clutter-free mailbox management across Microsoft 365 environment.
Track inactive archived mailboxes report to spot mailboxes with no recent activity and unarchive them if they are no longer needed.
Analyze mailbox size over time in Microsoft 365 and enable archives for those using excessive storage to optimize space and improve performance.
Verify that archive policies are correctly applied to mailboxes and ensure proper email retention with Microsoft 365 mailbox retention settings report.
Leverage mailbox usage dashboard to identify top storage consumers, track archive growth trends, and pinpoint mailboxes nearing storage limits.
Keep track of Exchange mailbox folder permissions to identify unauthorized access and ensure only authorized users have the necessary permissions.
Use archived mailboxes with over warning quota report to track archive storage usage and enable auto-expanding before mailboxes hit their storage limits.
In conclusion, AdminDroid's Exchange Online management tool provides an effective solution for monitoring archived mailboxes. With its comprehensive reports and real-time insights, you can efficiently track archived mailboxes, optimize mailbox storage, and ensure compliance across the organization.
This error occurs when the Enable-Mailbox cmdlet is executed without the Exchange Online module installed or when the necessary permissions to execute the cmdlet are missing.
This error occurs when you try to run a script in PowerShell and the system's execution policy restricts running unsigned scripts.
This error appears when attempting to enable an archive mailbox that is already archive-enabled.
This error occurs when configuring a retention tag if the retention period is not specified or exceeds the allowed limit of 1 to 24855 days.
Effective email storage in organizations depends on strategically managing older emails to prevent primary mailbox overload. By enabling archive mailboxes, users can seamlessly store significant historical data without compromising primary mailbox performance.
To enable online archive in Exchange Online, you can follow the methods below.
Note: With Microsoft 365 Enterprise E3/E5, Microsoft 365 Business Premium, or Exchange Online Plan 2, each user gets 100 GB of initial archive mailbox storage, expandable up to 1.5 TB with auto-expanding archiving.
However, with Microsoft 365 Business Basic, Microsoft 365 Business Standard, Microsoft 365 Enterprise E1, Exchange Online Kiosk, or Exchange Online Plan 1, archive mailbox storage is capped at 50 GB. This limitation can be addressed by purchasing the Exchange Online Archiving add-on license, which enables additional storage and auto-expanding archiving.
Archive mailbox sizes can grow over time, which might exceed storage quotas and lead to issues with retaining emails. By checking their size regularly, you can proactively manage storage limits. Here, you’ll learn how to view archive mailbox size in Exchange Online to ensure uninterrupted email services.
While the Exchange admin center provides an option to view archive mailbox sizes, manually checking the size of each archive mailbox can be time-consuming, especially for large organizations.
To overcome this inefficiency, you can use our 'GetArchiveMailboxSize.ps1' PowerShell script mentioned as solution in the Option 3. This script exports a detailed list of all archived mailboxes, including key information such as mailbox type, archive name, current size, quota, warning quota, and more.
Here's how the script provides more flexibility and granular reporting for archive mailboxes in your Exchange Online.
Get archive size for user mailboxes
To export archive enabled user mailboxes, you can run the script with the -UserMBOnly parameter.
Export all shared archive mailbox sizes
To find shared mailbox archive size, you can execute the script with the -SharedMBOnly parameter.
Identify mailboxes with auto-expanding archives
To list archived mailboxes with Exchange Online auto-expanding archive enabled, you can execute the script with the -AutoExpandingArchiveEnabled parameter.
By default, the Microsoft 365 Retention Policy includes several retention tags that delete or move items to the archive after a specific period. While these tags offer archiving, the default policy may not suit all scenarios, as you might require a different retention period. Therefore, understanding how to configure the archive policy effectively can help you tailor it to your organization's needs.
After creating the policy, apply the retention policy to the Exchange Online mailboxes to ensure the archive settings take effect.
Note: The archive policy moves all items to the archive regardless of their importance. As a result, important emails may also be archived without your notice.
Imagine a user receiving the alert: "Your archive mailbox is almost full". This warning signals that archive mailboxes are approaching their storage limits. If left unaddressed, it could disrupt archiving processes and create challenges in managing emails effectively. Below are some issues that can arise when an archive mailbox reaches its capacity.
To avoid disruptions and ensure seamless archiving, start by reviewing and deleting irrelevant or outdated content to free up space. Additionally, you can enable auto-expanding archiving to increase archive mailbox storage up to 1.5TB. However, this feature only supports for mailboxes with a growth rate that doesn't exceed 1 GB per day.
Note: Auto-expanding archiving can only be enabled through Exchange Online PowerShell. Once enabled, it cannot be disabled.
When the Microsoft 365 inbox keeps filling up, you'll face a critical choice for managing older emails: an archive folder or an archive mailbox? Understanding the differences between these two can help you decide the correct solution for organizing and storing your emails.
In conclusion, using online archive mailbox is an effective way to manage email storage, as it provides a dedicated space for storing older emails and offers features like auto-expanding archiving to handle growing data needs.
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