ASD's Blueprint for Secure Cloud


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

Estimated reading time: 1 minute

Journaling within Exchange is the recording of email communications as part of an organisation’s retention strategy.

Journaling can assist with achieving compliance with government regulations. A Journal rule can be scoped to:

  • Internal messages only
  • External messages only
  • All messages
  • Specific recipients

Microsoft 365 supports the use of journaling with the caveat that an Exchange Online mailbox cannot be used as a journaling mailbox. When configuring a mailbox for journaling, it must reside on an Exchange server. Journal reports can be delivered to a separate system from the Exchange Online instance.

Within Microsoft 365, additional options are available to be leveraged in an organisation’s retention strategy. These include:

  • Retention Policies
  • Litigation hold

Retention Policies can also be leveraged across the Office 365 organisation, whereas litigation hold is configured on a per-mailbox basis. These options reduce the complexity and management overhead involved with recording email and backing up to separate systems.

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

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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