Vulnerable Enterprise Vault on IIS

Dear Guys

I have implement enterprise vault 12.2 in my customer and then when we want to go live, their security policy scan the ev server website with acunetix web scan, they found 3 issue, one issue is high and then two more is medium, we can't go live if the enterprise vault website has vulnerability, result of webscan is below

1. Microsoft IIS tilde directory enumeration (this is high Risk)
2. RC4 cipher suites detected (Medium Risk)
3. The POODLE attack (SSLv3 supported) (medium risk)

so what i have to do to resolve this vulnerability ?

please help if you have experience about that, any help would be apreciated 

Thanks