Outlook 365 search function doesn't work after migration form iMac(late 2012) to MacBookAir M2 2022

After automatic migration from an iMac (late 2012) running under MacOS Catalina(v 10.6) to a MacBook Air with M2 chip (2022) MacOS Ventura (v13.0) the search function in Microsoft office Outlook 365 doesn't function anymore.

What needs to be done to get it working again.

Thank you in advance for your help.