ASD's Blueprint for Secure Cloud

Litigation Hold

This section describes the design decisions associated with Exchange Online for system(s) built using ASD's Blueprint for Secure Cloud.

Estimated reading time: 1 minute

Litigation hold preserves a mailbox and its contents from being modified or removed for eDiscovery purposes. A user can continue to send and receive email whilst litigation hold is enabled, even delete an item from the mailbox, and Office 365 will retain the items for discovery purposes.

Litigation hold is not enabled by default, and legal teams will need to proactively enable the feature to avoid users potentially deleting any critical data elements. The duration for the hold can also be specified. This is calculated from the date a mailbox item is received or created. If a duration is not set, items are held indefinitely or until the hold is removed.

Security & Governance

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Do you have a suggestion on how the above page could be improved? Get in touch! ASD's Blueprint for Secure Cloud is an open source project, and we would love to get your input. Submit an issue on our GitHub, or send us an email at

Acknowledgement of Country icon

Acknowledgement of Country
We acknowledge the Traditional Owners and Custodians of Country throughout Australia and their continuing connections to land, sea and communities. We pay our respects to them, their cultures and their Elders; past, present and emerging. We also recognise Australia's First Peoples' enduring contribution to Australia's national security.

Authorised by the Australian Government, Canberra