How to Fix Microsoft 365 DLP Rule and Policy Limit Errors
Question details
The user needs to resolve an error indicating that their Microsoft 365 tenant has exceeded the maximum allowed number of Data Loss Prevention (DLP) rules, policies, sites, users, groups, or sensitive information types.
- Product
- Microsoft 365
- Device & OS
- not provided
- Scenario
- Configuring or updating Data Loss Prevention (DLP) policies within the Microsoft 365 Purview compliance portal.
- Observed behavior
- The system displays an error message stating that a subscription-specific limit for DLP policies, rules, or specific inclusions/exclusions has been reached.
Make sure to record the exact error message, identify your current Microsoft 365 subscription tier, and verify whether other administrators in your tenant are experiencing the same limitation.
Audit and Reduce Policy Inclusions and Exclusions
Check your existing DLP policies to ensure they do not exceed the specific limits for SharePoint sites, OneDrive accounts, users, or groups.
Many DLP limitation errors are triggered by the contents of a policy rather than the total number of policies. There are strict limits on how many specific locations or accounts can be included or excluded in a single rule.
Log in to the Microsoft Purview compliance portal with your administrator credentials.
Go to the 'Data loss prevention' section and click on 'Policies' to view your active configurations.
Edit your policy and review the locations. Ensure that no more than 100 specific SharePoint sites or OneDrive accounts are selected as inclusions or exclusions.
Verify that you have not exceeded 100 user accounts or 50 groups for any specific inclusions or exclusions within the policy settings.
Consolidate Overall DLP Rules
Reduce the total number of active DLP rules to stay under your tenant's subscription cap, which is often limited to 600 rules.
Contact Microsoft Support for Subscription Details
If the exact limits for your specific Microsoft 365 subscription are unclear from the documentation, request clarification from Microsoft Support.
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Frequently Asked Questions
What is the maximum number of DLP rules allowed in Microsoft 365?
Depending on your specific Microsoft 365 subscription tier, many tenants have a strict limit of 600 Data Loss Prevention (DLP) rules across the entire organization.
How many SharePoint sites can I include in a single Microsoft 365 DLP policy?
A single DLP policy can contain no more than 100 specific SharePoint sites or OneDrive accounts as distinct inclusions or exclusions.
Why am I getting a DLP limit error when adding groups to a policy?
Microsoft 365 restricts certain policy configurations to a maximum of 50 groups or 100 individual user accounts for specific inclusions or exclusions. Exceeding this triggers a limit error.
Where can I check my current active DLP rules count?
You can view your DLP policies and their associated rules by logging into the Microsoft Purview compliance portal and navigating to the Data Loss Prevention section.
