Send only 1 automatic reply to each sender per day

Question

Hello

Mailbox is on exchange online. When an external sender, sends an email to a mailbox that has autoreply turned on, the mailbox will send an auto reply email every time it receives a message. Is it possible to send only 1 auto reply message per sender per day?

Answer 1

The Out Of Office auto reply only fires once per sender and there is no way to change that. So the same sender can sender multiple messages, but they will only get one reply while its enabled. Disabling and re-enabling it will clear those entries and start fresh.

https://learn.microsoft.com/en-us/exchange/troubleshoot/client-connectivity/one-reply-sent-sender