Microsoft Exchange offers powerful tools for searching, archiving, and reviewing emails. One of these tools, Compliance Search, is designed for eDiscovery but is equally effective for tracking suspicious emails, investigating malware incidents, or responding to security breaches..
What is Compliance Search?
Compliance Search first appeared in Exchange 2013. It provides a highly granular way to conduct email investigations by leveraging Exchange’s built-in indexing system. This indexing allows for efficient searches across email contents, including attachments, subject lines, and metadata.
For on-premises Exchange servers
There is no limit to the number of mailboxes that can be searched, but each individual search is restricted to a maximum of 500 mailboxes and 50 GB of data. In Microsoft 365, different limits may apply.
What Can You Search?
Email messages (including body text and metadata)
Attachments (except encrypted files or unsupported formats)
Contacts and calendar entries
Deduplication options (to avoid duplicate search results)
Compliance Search in Action
New-ComplianceSearch -name "Legal Case 280" -ExchangeLocation "Operations" -ContentMatchQuery "'Query' AND 'Akash'"In Office 365, a GUI interface is provided within the Compliance Center for easier execution.
Exchange 2010: The Predecessor to Compliance Search
Before Compliance Search, Exchange 2010 relied on "Multi-Mailbox Search." While less refined than Compliance Search, it offered advanced searching capabilities within a designated Discovery Management user group. This group allowed specific users to conduct advanced searches across the Exchange domain.
Compliance Search in Microsoft 365
For Microsoft 365 Exchange Online, Compliance Search is integrated into the Microsoft Purview interface, offering additional features such as:
Expanded search capabilities (including Teams, OneDrive, SharePoint, and even CoPilot AI prompts)
Keyword statistics (helping refine search terms and estimate matching results)
Litigation Holds (preventing deletion of identified emails, including future messages related to a case)
This makes Compliance Search a crucial tool for legal teams, cybersecurity analysts, and IT administrators when handling data retention, incident response, and regulatory compliance.
References
[l] Use Compliance Search to Search All Mailboxes in Exchange 2016: https://learn.microsoft.com/en-us/exchange/policy-and-compliance/ediscovery/compliance-search?view=exchserver-2019&redirectedfrom=MSDN
[2] New-ComplianceSearch: https://learn.microsoft.com/en-us/powershell/module/exchange/new-compliancesearch?view=exchange-ps&redirectedfrom=MSDN
-------------------------------------------Dean--------------------------------------------------
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