Number of milestones rollback is allowed

Specifies the minimum number of Google Chrome OS milestones rollback should be allowed starting from the stable version at any time.

Default is 0 for consumer, 4 (approx. half a year) for enterprise enrolled devices.

Setting this policy prevents rollback protection to apply for at least this number of milestones.

Setting this policy to a lower value has a permanent effect: the device MAY not be able to roll back to earlier versions even after the policy is reset to a larger value.

Actual rollback possibilities may also depend on the board and critical vulnerability patches.

Number of milestones rollback is allowed:

Registry Hive	HKEY_LOCAL_MACHINE
Registry Path	Software\Policies\Google\ChromeOS
Value Name	DeviceRollbackAllowedMilestones
Value Type	REG_DWORD
Default Value
Min Value	0
Max Value	4