I am able to get e-mail in inbox for Forgot Password. When click on RESET.
It does not accept any valid password.
Consistent displays "The new password you entered is invalid."
I tried all valid combination starting from weak password to strong
Sounds like you're on a Server instance that is connected to an external directory service such as LDAP or Active Directory. If that is the case, it's unlikely that you will be able to change your password via Confluence. You will need to follow your company's procedure for resetting your password via that directory service.
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