Hi ,
As per my knowledge, Active Directory will automatically apply the PSO with the highest priority setting, which is one of the user-controllable settings in the
PSO properties.
Still give it a try for below:
Did you modify PSO precedence, if no do as following:
To modify PSO precedence using the Windows interface
Open Active Directory Users and Computers. To open Active Directory Users and Computers, click Start, point to Administrative Tools, and then click Active Directory Users and Computers.
On the View menu, ensure that Advanced Features is checked.
In the console tree, click Password Settings Container.
Where?
Active Directory Users and Computers\domain node\System\Password Settings Container
In the details pane, right-click the PSO, and then click Properties.
Click the Attribute Editor tab.
Select the msDS-PasswordSettingsPrecedence attribute, and then click Edit.
In the IntegerAttribute Editor dialog box, enter the new value for the PSO Precedence, and then click OK.