ADMX Viewer
Microsoft.Policies.WindowsDefender• Machine

Define the maximum size of downloaded files and attachments to be scanned

This policy setting defines the maximum size (in kilobytes) of downloaded files and attachments that will be scanned. If you enable this setting, downloaded files and attachments smaller than the size specified will be scanned. If you disable or do not configure this setting, a default size will be applied.

Policy Details

Policy Name
RealtimeProtection_IOAVMaxSize
Registry Key
Software\Policies\Microsoft\Windows Defender\Real-Time Protection
Value Name
IOAVMaxSize
Supported On
At least Windows Server 2012, Windows 8 or Windows RT
OMA-URI (CSP)
ADMX_MicrosoftDefenderAntivirus/RealtimeProtection_IOAVMaxSize
OS Build Version:10.0.22000, 10.0.19043.1202, 10.0.19042.1202, 10.0.19041.1202
CSP Version:10.0
Conflict Resolution:LastWrite
Allowed Editions:
EnterpriseEnterprise NProfessionalProfessional NEnterprise EvaluationEnterprise N EvaluationEducationEducation NEnterprise SEnterprise S NEnterprise S EvaluationEnterprise S N EvaluationHolographic BusinessPro Single LanguagePro ChinaPro WorkstationPro Workstation NPro For EducationPro For Education NEnterprisegEnterprisegnServerrdshIotenterpriseIotenterprisesCloudeditionnCloudeditionIotenterpriseskIotenterpriseseval
Available Languages
en-us

Configuration Elements

Define the maximum size of downloaded files and attachments to be scanned

Type: decimal

Default: 20480

Min: 0
Max: 10000000