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Manage DLP policies

Exchange Online
 

Applies to: Exchange Server 2013, Exchange Online

Topic Last Modified: 2012-10-03

You can view, change, or remove existing data loss prevention (DLP) policies in Microsoft Exchange Server 2013, using the Exchange Administration Center (EAC) or the Exchange Management Shell.

For additional management tasks related to DLP, see DLP procedures.

For more information about The Exchange Management Shell, see Exchange Management Shell.

  • Estimated time to complete each procedure: 15-60 minutes

  • You need to be assigned permissions before you can perform this procedure or procedures. To see what permissions you need, see the “Data loss prevention (DLP)” entry in the Messaging policy and compliance permissions topic.

  • For any DLP policy, you can select one of three modes:

    Enforce   Rules within the policy are evaluated for all messages and supported file types. Mail flow can be disrupted if data is detected that meets the conditions of the policy. All actions described within the policy are taken.

    Test DLP policy with Policy Tips   Rules within the policy are evaluated for all messages and supported file types. Mail flow will not be disrupted if data is detected that meets the conditions of the policy. That is, messages are not blocked. If Policy Tips are configured, they are shown to users.

    Test DLP policy without Policy Tips   Rules within the policy are evaluated for all messages and supported file types. Mail flow will not be disrupted if data is detected that meets the conditions of the policy. That is, messages are not blocked. If Policy Tips are configured, they are not shown to users.

  • An individual rule within a DLP policy can have its own mode settings. When the mode of a policy is different than the mode of a rule within that policy, the rule setting has priority and will be evaluated according to its mode.

  • For information about keyboard shortcuts that may apply to the procedures in this topic, see Keyboard shortcuts in the Exchange admin center.

TipTip:
Having problems? Ask for help in the Exchange forums. Visit the forums at: Exchange Server, Exchange Online, or Exchange Online Protection.

You may need to view the rules and actions of an existing DLP policy that you have already established for your organization. This can be useful if you experience unexpected mail flow issues or if your organization changes the way sensitive information needs to be monitored.

  1. In the EAC, navigate to Compliance management > Data loss prevention.

  2. Double-click one of the policies that appear in your list of policies, or highlight one item and click Edit Edit icon.

  3. On the Edit DLP policy page, click Rules.

TipTip:
You can create a DLP policy and leave it in a non-activated or disabled mode. In this mode, a policy is not enforced and you can change any predicates, actions, or values associated with its rules before you test or begin enforcing it.

This example returns information about the fictitious DLP policy named Employee Numbers. The command is piped to the Format-List cmdlet to display the detailed configuration of the specified DLP policy.

Get-DlpPolicy "Employee Numbers" | Format-List

For syntax and parameter information, see Get-DlpPolicy.

You can change an existing DLP policy by modifying either the name of the policy or the rules that govern the effects of the policy. An example rule change might include adding custom disclaimer text to a message body and RMS protection for messages sent within a specific domain and that are detected to have sensitive information. If you are using DLP policy templates, keep in mind that these are only one of the features in Exchange 2013 that can help you design and apply a robust policy and compliance system for your messaging environment.

  1. In the EAC, navigate to Compliance management > Data loss prevention.

  2. Double-click one of the template-based policies that appear in your list of policies or highlight one item and click Edit Edit icon.

  3. On the Edit DLP policy page, click Rules.

  4. To change an existing rule, highlight the rule and click Edit Edit icon.

  5. To add a new blank rule that you can fully customize, click New Add Icon.

  6. To add a rule about sender notification, blocking messages, or allowing overrides, click the arrow next to the New Add Icon icon.

  7. To remove a rule, highlight the rule and click Delete Delete Icon.

  8. Click Save to finish modifying the policy and save your changes.

You can specify the action and notification level of a policy using the Exchange Management Shell. This example sets the mode for a fictitious DLP policy named Employee Numbers so that the actions are not enforced and notification messages are not displayed.

Set-DlpPolicy "Employee Numbers" -Mode Audit

For syntax and parameter information, see Set-DlpPolicy.

You can permanently remove a DLP policy using the EAC. Once you’ve deleted a policy, it will no longer be enforced and none of the rules and actions will be saved.

Alternatively, you can set the operational state or mode of a policy to Test DLP policy without Policy Tips. This stops it from being enforced in your message environment, but preserves the detailed configuration settings of the policy itself. This can be useful if there is a possibility that you will need to enforce the policy again in the future.

  1. In the EAC, navigate to Compliance management > Data loss prevention.

  2. Select the policy you want to remove in your list of policies, and then click Delete Delete Icon.

This example removes the fictitious DLP policy named Employee Numbers.

Remove-DlpPolicy "Employee Numbers"

For syntax and parameter information, see Remove-DlpPolicy.

 
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