Document Lifecycle Management Essentials

Purview is the backbone of M365 and controls many aspects of the platform. As an extension, it also controls many aspects when it comes to managing content and files stored on the platform. Your files live on SharePoint or Teams or OneDrive. But Purview controls how these are kept, managed and ultimately disposed.

Make sure you adjust these settings on day one since Microsoft is notorious for not fixing backward which means that any setting changes made only apply from this moment onwards.

In terms of managing content and documents, the Data Lifecycle Management area will be the most important location on Purview. This menu can be found on the left hand side bar, and if not, then click on the Apps to locate and pin it.

Data Lifecycle Management

• Retention labels Creates and publish document labels which will be covered in a separate article. Pair these up with your retention policies to match labels to disposition policies for greater control over your content.

• Policies This is where retention and disposition policies are created and maintained. The created policies can be used to help decide on what to do with content after set dates or events have transpired. For example, you might want to automatically delete all emails from Outlook that are older than 20 years from the "sent" date, or more commonly, you want to automatically delete files from SharePoint that are older than your maximum retention date, say 10 years. You can have multiple policies for different parts of M365, as well as multiple policies for one platform.

• Classifiers Predominately for setting up of Trainable Classifiers and Sensitive Info types which applies automation to identifying and classification of files.. These will be covered in another article for a wider explanation. But basically, you can train up the system to look out for specific content or keywords and then decide how to want that content to be treated. Very powerful, but may be foreshadowed at a later date by the more modern and easier to use Microsoft Syntex.

• Explorers Very useful dashboards for getting an overview of data tagging, classifications and policy activities. Tells you how well (or not well) your settings are doing and how many tags and labels have been applied. Useful in combination with retention activities, measuring content risk with sensitivity labels.

We are ignoring some of the other menu items as they either have limited value or are in Preview, which means that Microsoft has this in Trial mode and the functionality can changed or removed at any time.

Document retention and disposal isn't just about administrative tidying; it is a critical operational safeguard that directly impacts legal standing, security, and bottom-line expenses. When organizations treat records management as an afterthought, they expose themselves to unnecessary risk and wasted resources.

Legal and Regulatory Compliance

State laws, federal regulations, and industry standards require businesses to keep specific records for mandated timeframes. Tax filings, payroll registers, employee safety logs, and audited financial statements all carry explicit statutory retention periods. Failing to maintain these files can lead to severe financial penalties, failed audits, and operational suspension.

Litigation Risk and E-Discovery Costs

In the event of a lawsuit or government inquiry, a court may order an organization to produce all relevant internal communication and documentation (e-discovery). Retaining legacy documents past their required life cycle drastically increases the volume of data lawyers must collect, index, and review. This inflates legal bills exponentially. Furthermore, keeping informal emails, obsolete policy drafts, or forgotten notes leaves behind a trail of unnecessary documentation that can be taken out of context during legal disputes.

Data Security and Privacy Protection

Every old file sitting on a server or tucked in a filing cabinet represents a potential data breach vector. Old customer records, job applications, and expired contracts often contain personally identifiable information (PII) or confidential intellectual property. If a hacker breaches your network, expired data gets stolen right alongside active files, multiplying your legal liability and reputational damage. Disposing of files securely—through certified shredding or permanent digital wiping—ensures that sensitive information cannot be retrieved once its purpose has ended.

Controlling Physical and Cloud Storage Costs

Data storage is never free. Physical files require rented warehouse space, secure storage boxes, and climate control. Digital files require cloud storage subscriptions, backup redundancy, and ongoing server maintenance. Accumulating years of redundant, obsolete, and trivial (ROT) data inflates IT infrastructure budgets. Routine document purging reclaims storage capacity and eliminates unnecessary recurring costs.

Operational Efficiency

Employees waste hours every week sifting through cluttered shared drives, duplicate folders, and outdated versions of documents. A clear retention policy streamlines searchability so staff can find accurate, up-to-date information quickly.

By enforcing a strict schedule for retaining necessary files and permanently destroying outdated ones, a business protects its legal interests, hardens its data security, and keeps operational overhead lean.

Why document retention and disposition matters?

eDiscovery performs some seriously powerful searches and this function is generally reserved for investigative or audit functions with an organisation. This is because cases are able to interrogate ALL aspects of M365, profiles, content, data and activity across the tenant.

• Cases Creates and run powerful content searches across the tenant. You can run simultaneous cases across content and have these run in the background as some retrievals can take a long time.

• Content Search Run search cases across the tenant or for specific platforms, sites and locations. These can include locations like private chat on Teams, preservation hold libraries, recycle bin, and even into previously purged deleted items (to a certain extent). Possibly a bit too powerful for the average user, so best left used by auditors or investigators.

• Dashboards Process and hold reports which are outputs from the case and content search runs.

eDiscovery

More policy settings and configurations for protecting data and information on the tenant. Key controls are below, but will be expanded in other articles (otherwise this will be VERY long)

• Sensitivity Labels Defining, setting and prioritizing of sensitivity labels which will impact content across the areas applied to. Definitely important to get right.

  Policies This is where we can apply auto-classification labels on documents, as well as define label and protection policies.

• Classifiers Where we can setup and test trainable classifiers and look at EDM policies

Again, we are going to ignore some of the other menu items as they either have limited value.

Information Protection

Contact: info@m365-simplified.com