For a given system and or account, can a time window be set to allow/deny password releases, i.e., if you wanted to protect a system from changes during critical business hours?
A time window cannot be set to allow/deny password releases.
Releasing passwords is outlined in the admin guide starting on page 138.
Of course you have the option of selecting who is authorized to request the password release, as well as require approvals for the changes. So from a time perspective you couldn't deny, but the approver could approve or deny based on the requested time.