The message “(Title of Message)” could not be moved to the mailbox “(null)”. The destination mailbox does not exist.

peterhziegler wrote:

Hi Community,

I'm having trouble with Mac Mail on my MacBook Pro with Ventura 13.4.1. There are 7 mail accounts configured, 5 of them are M365 accounts on 3 different tenants. After the last update, 3 of the accounts (all in one tenant) show the error message in the title.

But, if I move the messages manually and drag them in the respective archive folder, no error message. On my iPhone or iPad, no error message. The error only occurs when I use the built-in function to archive a message.

Any thoughts on that? TIA!

The current stable release of Ventura including bug fixes, security updates is macOS Ventura 13.5 - I would start there

Keep your Mac up to date - Apple Support

Keep your Mac up to date - Apple Support