---
title: EventLogService Policy CSP
description: Learn more about the EventLogService Area in Policy CSP.
ms.date: 01/18/2024
---

<!-- Auto-Generated CSP Document -->

<!-- EventLogService-Begin -->
# Policy CSP - EventLogService

[!INCLUDE [ADMX-backed CSP tip](includes/mdm-admx-csp-note.md)]

<!-- EventLogService-Editable-Begin -->
<!-- Add any additional information about this policy here. Anything outside this section will get overwritten. -->
<!-- EventLogService-Editable-End -->

<!-- ControlEventLogBehavior-Begin -->
## ControlEventLogBehavior

<!-- ControlEventLogBehavior-Applicability-Begin -->
| Scope | Editions | Applicable OS |
|:--|:--|:--|
| ✅ Device <br> ❌ User | ✅ Pro <br> ✅ Enterprise <br> ✅ Education <br> ✅ Windows SE <br> ✅ IoT Enterprise / IoT Enterprise LTSC | ✅ Windows 10, version 1703 [10.0.15063] and later |
<!-- ControlEventLogBehavior-Applicability-End -->

<!-- ControlEventLogBehavior-OmaUri-Begin -->
```Device
./Device/Vendor/MSFT/Policy/Config/EventLogService/ControlEventLogBehavior
```
<!-- ControlEventLogBehavior-OmaUri-End -->

<!-- ControlEventLogBehavior-Description-Begin -->
<!-- Description-Source-ADMX -->
This policy setting controls Event Log behavior when the log file reaches its maximum size.

- If you enable this policy setting and a log file reaches its maximum size, new events aren't written to the log and are lost.

- If you disable or don't configure this policy setting and a log file reaches its maximum size, new events overwrite old events.

> [!NOTE]
> Old events may or may not be retained according to the "Backup log automatically when full" policy setting.
<!-- ControlEventLogBehavior-Description-End -->

<!-- ControlEventLogBehavior-Editable-Begin -->
<!-- Add any additional information about this policy here. Anything outside this section will get overwritten. -->
<!-- ControlEventLogBehavior-Editable-End -->

<!-- ControlEventLogBehavior-DFProperties-Begin -->
**Description framework properties**:

| Property name | Property value |
|:--|:--|
| Format | `chr` (string) |
| Access Type | Add, Delete, Get, Replace |
<!-- ControlEventLogBehavior-DFProperties-End -->

<!-- ControlEventLogBehavior-AdmxBacked-Begin -->
[!INCLUDE [ADMX-backed policy note](includes/mdm-admx-policy-note.md)]

**ADMX mapping**:

| Name | Value |
|:--|:--|
| Name | Channel_Log_Retention_1 |
| Friendly Name | Control Event Log behavior when the log file reaches its maximum size |
| Location | Computer Configuration |
| Path | Windows Components > Event Log Service > Application |
| Registry Key Name | Software\Policies\Microsoft\Windows\EventLog\Application |
| Registry Value Name | Retention |
| ADMX File Name | EventLog.admx |
<!-- ControlEventLogBehavior-AdmxBacked-End -->

<!-- ControlEventLogBehavior-Examples-Begin -->
<!-- Add any examples for this policy here. Examples outside this section will get overwritten. -->
<!-- ControlEventLogBehavior-Examples-End -->

<!-- ControlEventLogBehavior-End -->

<!-- SpecifyMaximumFileSizeApplicationLog-Begin -->
## SpecifyMaximumFileSizeApplicationLog

<!-- SpecifyMaximumFileSizeApplicationLog-Applicability-Begin -->
| Scope | Editions | Applicable OS |
|:--|:--|:--|
| ✅ Device <br> ❌ User | ✅ Pro <br> ✅ Enterprise <br> ✅ Education <br> ✅ Windows SE <br> ✅ IoT Enterprise / IoT Enterprise LTSC | ✅ Windows 10, version 1703 [10.0.15063] and later |
<!-- SpecifyMaximumFileSizeApplicationLog-Applicability-End -->

<!-- SpecifyMaximumFileSizeApplicationLog-OmaUri-Begin -->
```Device
./Device/Vendor/MSFT/Policy/Config/EventLogService/SpecifyMaximumFileSizeApplicationLog
```
<!-- SpecifyMaximumFileSizeApplicationLog-OmaUri-End -->

<!-- SpecifyMaximumFileSizeApplicationLog-Description-Begin -->
<!-- Description-Source-ADMX -->
This policy setting specifies the maximum size of the log file in kilobytes.

- If you enable this policy setting, you can configure the maximum log file size to be between 1 megabyte (1024 kilobytes) and 2 terabytes (2147483647 kilobytes), in kilobyte increments.

- If you disable or don't configure this policy setting, the maximum size of the log file will be set to the locally configured value. This value can be changed by the local administrator using the Log Properties dialog, and it defaults to 1 megabyte.
<!-- SpecifyMaximumFileSizeApplicationLog-Description-End -->

<!-- SpecifyMaximumFileSizeApplicationLog-Editable-Begin -->
<!-- Add any additional information about this policy here. Anything outside this section will get overwritten. -->
<!-- SpecifyMaximumFileSizeApplicationLog-Editable-End -->

<!-- SpecifyMaximumFileSizeApplicationLog-DFProperties-Begin -->
**Description framework properties**:

| Property name | Property value |
|:--|:--|
| Format | `chr` (string) |
| Access Type | Add, Delete, Get, Replace |
<!-- SpecifyMaximumFileSizeApplicationLog-DFProperties-End -->

<!-- SpecifyMaximumFileSizeApplicationLog-AdmxBacked-Begin -->
[!INCLUDE [ADMX-backed policy note](includes/mdm-admx-policy-note.md)]

**ADMX mapping**:

| Name | Value |
|:--|:--|
| Name | Channel_LogMaxSize_1 |
| Friendly Name | Specify the maximum log file size (KB) |
| Location | Computer Configuration |
| Path | Windows Components > Event Log Service > Application |
| Registry Key Name | Software\Policies\Microsoft\Windows\EventLog\Application |
| ADMX File Name | EventLog.admx |
<!-- SpecifyMaximumFileSizeApplicationLog-AdmxBacked-End -->

<!-- SpecifyMaximumFileSizeApplicationLog-Examples-Begin -->
<!-- Add any examples for this policy here. Examples outside this section will get overwritten. -->
<!-- SpecifyMaximumFileSizeApplicationLog-Examples-End -->

<!-- SpecifyMaximumFileSizeApplicationLog-End -->

<!-- SpecifyMaximumFileSizeSecurityLog-Begin -->
## SpecifyMaximumFileSizeSecurityLog

<!-- SpecifyMaximumFileSizeSecurityLog-Applicability-Begin -->
| Scope | Editions | Applicable OS |
|:--|:--|:--|
| ✅ Device <br> ❌ User | ✅ Pro <br> ✅ Enterprise <br> ✅ Education <br> ✅ Windows SE <br> ✅ IoT Enterprise / IoT Enterprise LTSC | ✅ Windows 10, version 1703 [10.0.15063] and later |
<!-- SpecifyMaximumFileSizeSecurityLog-Applicability-End -->

<!-- SpecifyMaximumFileSizeSecurityLog-OmaUri-Begin -->
```Device
./Device/Vendor/MSFT/Policy/Config/EventLogService/SpecifyMaximumFileSizeSecurityLog
```
<!-- SpecifyMaximumFileSizeSecurityLog-OmaUri-End -->

<!-- SpecifyMaximumFileSizeSecurityLog-Description-Begin -->
<!-- Description-Source-ADMX -->
This policy setting specifies the maximum size of the log file in kilobytes.

- If you enable this policy setting, you can configure the maximum log file size to be between 20 megabytes (20480 kilobytes) and 2 terabytes (2147483647 kilobytes), in kilobyte increments.

- If you disable or don't configure this policy setting, the maximum size of the log file will be set to the locally configured value. This value can be changed by the local administrator using the Log Properties dialog, and it defaults to 20 megabytes.
<!-- SpecifyMaximumFileSizeSecurityLog-Description-End -->

<!-- SpecifyMaximumFileSizeSecurityLog-Editable-Begin -->
<!-- Add any additional information about this policy here. Anything outside this section will get overwritten. -->
<!-- SpecifyMaximumFileSizeSecurityLog-Editable-End -->

<!-- SpecifyMaximumFileSizeSecurityLog-DFProperties-Begin -->
**Description framework properties**:

| Property name | Property value |
|:--|:--|
| Format | `chr` (string) |
| Access Type | Add, Delete, Get, Replace |
<!-- SpecifyMaximumFileSizeSecurityLog-DFProperties-End -->

<!-- SpecifyMaximumFileSizeSecurityLog-AdmxBacked-Begin -->
[!INCLUDE [ADMX-backed policy note](includes/mdm-admx-policy-note.md)]

**ADMX mapping**:

| Name | Value |
|:--|:--|
| Name | Channel_LogMaxSize_2 |
| Friendly Name | Specify the maximum log file size (KB) |
| Location | Computer Configuration |
| Path | Windows Components > Event Log Service > Security |
| Registry Key Name | Software\Policies\Microsoft\Windows\EventLog\Security |
| ADMX File Name | EventLog.admx |
<!-- SpecifyMaximumFileSizeSecurityLog-AdmxBacked-End -->

<!-- SpecifyMaximumFileSizeSecurityLog-Examples-Begin -->
<!-- Add any examples for this policy here. Examples outside this section will get overwritten. -->
<!-- SpecifyMaximumFileSizeSecurityLog-Examples-End -->

<!-- SpecifyMaximumFileSizeSecurityLog-End -->

<!-- SpecifyMaximumFileSizeSystemLog-Begin -->
## SpecifyMaximumFileSizeSystemLog

<!-- SpecifyMaximumFileSizeSystemLog-Applicability-Begin -->
| Scope | Editions | Applicable OS |
|:--|:--|:--|
| ✅ Device <br> ❌ User | ✅ Pro <br> ✅ Enterprise <br> ✅ Education <br> ✅ Windows SE <br> ✅ IoT Enterprise / IoT Enterprise LTSC | ✅ Windows 10, version 1703 [10.0.15063] and later |
<!-- SpecifyMaximumFileSizeSystemLog-Applicability-End -->

<!-- SpecifyMaximumFileSizeSystemLog-OmaUri-Begin -->
```Device
./Device/Vendor/MSFT/Policy/Config/EventLogService/SpecifyMaximumFileSizeSystemLog
```
<!-- SpecifyMaximumFileSizeSystemLog-OmaUri-End -->

<!-- SpecifyMaximumFileSizeSystemLog-Description-Begin -->
<!-- Description-Source-ADMX -->
This policy setting specifies the maximum size of the log file in kilobytes.

- If you enable this policy setting, you can configure the maximum log file size to be between 1 megabyte (1024 kilobytes) and 2 terabytes (2147483647 kilobytes), in kilobyte increments.

- If you disable or don't configure this policy setting, the maximum size of the log file will be set to the locally configured value. This value can be changed by the local administrator using the Log Properties dialog, and it defaults to 1 megabyte.
<!-- SpecifyMaximumFileSizeSystemLog-Description-End -->

<!-- SpecifyMaximumFileSizeSystemLog-Editable-Begin -->
<!-- Add any additional information about this policy here. Anything outside this section will get overwritten. -->
<!-- SpecifyMaximumFileSizeSystemLog-Editable-End -->

<!-- SpecifyMaximumFileSizeSystemLog-DFProperties-Begin -->
**Description framework properties**:

| Property name | Property value |
|:--|:--|
| Format | `chr` (string) |
| Access Type | Add, Delete, Get, Replace |
<!-- SpecifyMaximumFileSizeSystemLog-DFProperties-End -->

<!-- SpecifyMaximumFileSizeSystemLog-AdmxBacked-Begin -->
[!INCLUDE [ADMX-backed policy note](includes/mdm-admx-policy-note.md)]

**ADMX mapping**:

| Name | Value |
|:--|:--|
| Name | Channel_LogMaxSize_4 |
| Friendly Name | Specify the maximum log file size (KB) |
| Location | Computer Configuration |
| Path | Windows Components > Event Log Service > System |
| Registry Key Name | Software\Policies\Microsoft\Windows\EventLog\System |
| ADMX File Name | EventLog.admx |
<!-- SpecifyMaximumFileSizeSystemLog-AdmxBacked-End -->

<!-- SpecifyMaximumFileSizeSystemLog-Examples-Begin -->
<!-- Add any examples for this policy here. Examples outside this section will get overwritten. -->
<!-- SpecifyMaximumFileSizeSystemLog-Examples-End -->

<!-- SpecifyMaximumFileSizeSystemLog-End -->

<!-- EventLogService-CspMoreInfo-Begin -->
<!-- Add any additional information about this CSP here. Anything outside this section will get overwritten. -->
<!-- EventLogService-CspMoreInfo-End -->

<!-- EventLogService-End -->

## Related articles

[Policy configuration service provider](policy-configuration-service-provider.md)