Merge pull request MicrosoftDocs#2142 from nschonni/patch-1

typo: agressive -> aggressive

Author: kenwith

exchange/exchange-ps/exchange/advanced-threat-protection/New-AntiPhishPolicy.md

@@ -379,7 +379,7 @@ The PhishThresholdLevel parameter specifies the tolerance level that's used by m
 
 - 2: Aggressive
 
-- 3: More agressive
+- 3: More aggressive
 
 - 4: Most aggressive