Hi!

Announcing the Out of office (vacation) Admin extension.

This extension enables administrators to modify the current out of office information for a user without switching to his or her mailbox view.
This basically incorporates the "Vacation" setting view used in Zimbra 8.x into the account view of the Administration Console.
compatible with ZCS 8.x, probably 7.x.

Zimlet-Gallery
Github-Repository
Download v1.0