When looking at the documentation for Azure AD password policy, I do not see any restriction on previous password history usage with the exception that it cannot be the last password. Is it possible to set a password policy that does not allow the last 15 passwords to be used when changing passwords in Azure?
FYI - We are not using on-premise domain/syncing, but we are leveraging Azure Active Directory Domain Services.
I sorry to tell you that it's impossible to change the password policy on using old password in azure ad according to ms document. It's said clearly that creating custom password policy is only effective for on-premises ad.