Microsoft has released Hotfix Updates (HUs) that enable support for new functionality and address issues in the March 2024 Security Update (SU).
The April 2024 HU is available for the following bui...
Updated May 06, 2024
Version 4.0
Blog Post
We are having an issue with searching from shared mailboxes hosted on on-prem Exchange 2016 CU23 servers, even with hotfix 5037224 installed. This problem occurs in outlook version 17425.20236 which is the latest Monthly Enterprise channel release. When user enters a search term and hits search or enter, nothing happens. not "no results", just no response from the GUI, no search is initiated. If we turn off cached mode (not ideal), it works.
This happened before and seemed to be resolved by later installation of an Exchange Server security update.
is there some interdependence that isn't being flagged, between particular versions of outlook and particular exchange security updates.