[Dovecot] Sieve Vacation virtual support?

Hello,

I'm wanting to enable vacation messages for my users on a new dovecot server that I'm playing with, but want to know if the Dovecot LDA+Sieve vacation message function

http://wiki.dovecot.org/LDA/Sieve

will work with virtual users? For security reasons, I only want to use virtual domains/users.

Thanks...

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Best regards,

Charles