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Update recommendation for high accuracy time sync #8006

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Original file line number Diff line number Diff line change
Expand Up @@ -102,12 +102,6 @@ Configures the smallest interval in log2 seconds allowed for system polling.
| Setting | 6 |
| Outcome | The minimum polling interval is now 64 seconds. |

The following command signals Windows Time to pick up the updated settings:

```cmd
w32tm /config /update
```

### MaxPollInterval

Configures the largest interval in log2 seconds allowed for system polling.
Expand All @@ -118,12 +112,6 @@ Configures the largest interval in log2 seconds allowed for system polling.
| Setting | 6 |
| Outcome | The maximum polling interval is now 64 seconds. |

The following command signals Windows Time to pick up the updated settings:

```cmd
w32tm /config /update
```

### UpdateInterval

The number of clock ticks between phase correction adjustments.
Expand All @@ -134,12 +122,6 @@ The number of clock ticks between phase correction adjustments.
| Setting | 100 |
| Outcome | The number of clock ticks between phase correction adjustments is now 100 ticks. |

The following command signals Windows Time to pick up the updated settings:

```cmd
w32tm /config /update
```

### SpecialPollInterval

Configures the poll interval in seconds when the SpecialInterval 0x1 flag is enabled.
Expand All @@ -150,18 +132,36 @@ Configures the poll interval in seconds when the SpecialInterval 0x1 flag is ena
| Setting | 64 |
| Outcome | The poll interval is now 64 seconds. |

The following command restarts Windows Time to pick up the updated settings:

```cmd
net stop w32time && net start w32time
```

### FrequencyCorrectRate

| Description | Value |
|--|--|
| Key location | HKLM\SYSTEM\CurrentControlSet\Services\W32Time\Config |
| Setting | 2 |

### UtilizeSslTimeData

| Description | Value |
|--|--|
| Key location | HKLM\SYSTEM\CurrentControlSet\Services\W32Time\Config |
| Setting | 0 |
| Outcome | Secure Time Seeding feature is disabled. |

## Applying Modified Registry settings

The following command signals Windows Time to pick up the updated settings:

```cmd
w32tm /config /update
```

The following command restarts Windows Time to pick up the updated settings:

```cmd
net stop w32time && net start w32time
```

Applying UtilizeSslTimeData settings changes requires systestem restart.
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"system"


> [!NOTE]
> To learn more about the W32Time registry settings, see [Windows Time registry reference](Windows-Time-Service-Tools-and-Settings.md#windows-time-registry-reference)