Hello,
I think there's a misunderstanding about those parameters.
enable autoreply time at and disable autoreply time at should be used to set a timespan in the day when the autoreply is sent. They should'nt be used to set a rule like from 2024/03/02 19:00 to 2024/03/10 10:00.

In your screenshot, the autoreply is only sent between 17:00 and 23:59 everyday starting at 2025-03-13

Thanks for clarifying!
But: I configured a vacation for 13.3.24 between 17:00 and 23:59. Did that at 16:00..
Sending a testmail has been replied with a vacation message. Shouldn't happen ... or do I still misunderstand the parameters?

Sorry for the typos: Should be 13.3.2025.
I sent the testmail before 17:00.

Could you check what is written in your sieve script? I don't see any relating things about date and time in the one you put here.
If there is nothing check the capabilities of your sieve server, they must have date and relational for it to work.

Thanks a lot. I rechecked our sieve server which is not ready for date and relational.