How to Manage 200 GB Mailbox Storage in Exchange Online
Question details
Organizations need a strategy to support high-capacity mailboxes requiring up to 200 GB of storage.
- Product
- Exchange Online
- Device & OS
- not provided
- Scenario
- Planning or managing high-capacity email storage requirements for enterprise users who exceed standard mailbox limits.
- Observed behavior
- Standard primary mailboxes have fixed storage limits, necessitating an archiving solution to accommodate storage needs up to 200 GB.
Verify your current Microsoft 365 or Exchange Online subscription tier to determine if it supports Exchange Online Archiving and to check the maximum primary mailbox size permitted by your license.
Enable Exchange Online Archiving and Retention Policies
Use online archiving to offload older messages to a separate archive mailbox, effectively providing extended or unlimited storage capacity for users.
Exchange Online Archiving provides an additional archive mailbox that stores older messages separately from the primary mailbox. Depending on your organization's plan and configuration, this archive can provide significant extra storage, including auto-expanding archives in eligible configurations.
Confirm that your organization uses an Exchange Online plan (such as Plan 2) or an equivalent enterprise license that includes unlimited archiving or allows for the necessary storage scale.
Access the Exchange admin center or Microsoft Purview compliance portal. Select the eligible user accounts, open their mailbox settings, and toggle on the Exchange Online Archiving feature.
If you require more than 1.5 TB of storage or specifically need to bypass standard limits, enable the auto-expanding archiving feature via Exchange Online PowerShell for your organization or specific users.
Set up retention tags and retention policies in the compliance portal to automatically move emails older than a specific timeframe (e.g., 2 years) from the primary inbox directly to the archive mailbox.
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Frequently Asked Questions
What is Exchange Online Archiving?
Exchange Online Archiving is a Microsoft 365 feature that provides users with an additional mailbox to store older emails. It helps free up space in the primary mailbox while keeping older messages organized and accessible.
Does Exchange Online Plan 1 support a 200 GB mailbox natively?
By default, Exchange Online Plan 1 offers a 50 GB primary mailbox and a 50 GB archive mailbox. To achieve up to 200 GB or unlimited storage, you typically need Exchange Online Plan 2 or a supplemental add-on license that supports auto-expanding archiving.
How do retention policies work with online archiving?
Retention policies can be configured by an administrator to automatically transfer emails to the archive mailbox after a specified period. This reduces the need for users to manually manage their storage or drag files into their archive folders.
Can users access their archived emails from a mobile device?
Yes, archived emails can be accessed through the Outlook mobile app, Outlook on the web, or the desktop version of Outlook, provided the user has an active internet connection.
