What is the possible reason?

Users who are disabled for Veritas Enterprise Vault 12.3 complain that they see the Enterprise Vault Office Mail App in OWA 2013.

What is the possible reason?
A . Enterprise Vault Office Mail App was installed using the Enterprise Vault OWA Extensions
B . Enterprise Vault Office Mail App was deployed at the Organization level in Exchange
C . Enterprise Vault Office Mail App was installed using PowerShell commands with OWAUser.wsf
D . Enterprise Vault Office Mail App was installed using EVPM and OfficeMailAppManifest.xml

View Answer

Answer: B