DLP policy priority
DLP policies and the rules inside them have a priority, and priority 0 at the top is evaluated first. When content matches several rules, the most restrictive action is enforced, and priority only breaks a tie. An email that matches two policies gets the stricter action, and the employee sees only one policy tip.
W
DATA LOSS PREVENTION · PRIORITY
DLP policy priority
Ada Admin
Eli Employee
THE SHORT ANSWER
Does DLP stop at the first match?
No.
1
Policies are evaluated in priority order, starting with 0.
2
Content can match rules in several policies at once.
3
The most restrictive action is enforced.
Priority decides only between rules that are equally strict.
Microsoft Purview
Home
Information Protection
Sensitivity labels
Data Loss Prevention
Policies
Sensitivity labels
PRIORITY
NAME
PROTECTION
Move up
Move down
Move to bottom
The label at the bottom has the highest priority.
Policies › EXO-Label
Rules
PRIORITY
RULE
ACTION
0
Internal to external
Policy tip
1
Confidential to external
Block, override with justification
2
Strictly Confidential to external
Block
Rules get their priority in the order they're created.
Each label only matches one rule here, so the order doesn't matter.
EXO-Label › Confidential to external
Edit rule
Conditions, actions, notifications and overrides are above.
⌃ Additional options
If there's a match for this rule, stop processing additional DLP policies and rules.
Evaluate rule per component
Off
Set the order in which this rule will be selected for evaluation
Priority:
1
▼
Save
Cancel
Policies
PRIORITY
NAME
LOCATION
MODE
Priority 0 at the top is evaluated first.
WHAT THE LABEL ORDER DECIDES
Lower or higher is read from the list
HOW ONE EMAIL IS EVALUATED
All policies are evaluated, the strictest action wins
ONE EMAIL, TWO POLICIES
Customer contract.docx, Confidential, with an IP address
POLICY
RULE
ACTION
APPLIED
The most restrictive action wins.
Block with override is stricter than a policy tip, so EXO-Label is enforced.
With SIT-Awareness at priority 0, the result would be the same.
Eli sees one policy tip, from the rule that is enforced.
New message · Outlook
Send
To
anna@partnerco.example
External
Subject
Customer contract
Confidential content. You can send it outside the organization only with a business justification.
Customer contract.docx
Confidential
Hi Anna, the contract is attached. The VPN endpoint is 203.0.113.24.
Not shown
SIT-Awareness: IP address in content
Action: policy tip only
Users see one tip at a time,
from the rule that is enforced.
Board minutes.docx · Word
Strictly Confidential
Sensitivity ▾
Board minutes
Justification required
Your organization requires a justification to change
this label to one with lower sensitivity.
Previous label no longer applies
Previous label was incorrect
Other (explain)
Change
Cancel
THE USER EXPERIENCE
What Eli notices
Users never see the priorities, only the result of them.
Good to know
1/7
DATA LOSS PREVENTION
DLP policy priority
DLP policies and their rules are evaluated from the top,
starting with priority 0. But when content matches several
rules, the most restrictive action wins, and the user sees
only one policy tip.
informasjonsbeskyttelse.no
Previous
Next
Play
Restart
Fullscreen
Sound: off