You may have noticed that while setting the password policy’s Minimum Password Age to 0, it automatically reverts the value back to 1 (default setting).
This occurs by design. An enhancement request (VSTS113379) has been created detailing the feature above.
Uncheck the password age rule to set the value back to AD’s default setting (0) and configure the maximum age via GPO.
The product team will evaluate the request and this feature may become available on a future release of the product.
Please refer to this article for updates or contact support referencing the Enhancement Request ID: VSTS113379.