Outlook 2019 desktop app. shared calendar other user with full access but cannot search in calendar. 365 mailbox

Question

Hello,

Windows 10 Pc with deskto applicaiton Office 2019. Outlook is configured for the user his own 365 mailbox.

In the same outlook desktop application there is a shared calendar from another user with full access also a 365 basic mailbox .

So the user can add appointments, change ,... at that point no issue in the shared calendar.

The problem that exist is that the user cannot search in the shared calendar when the user is searching something there is no result. Before it has worked without any problem.

Other users on different Pc that use the same shared calendar has no issues to search on the same shared calendar.

So 100% sure that there is something localy wrong.

On the sharing permissions of the calendar nothing has been changed so the users has still full control only search is not working.

Searching in the own 365 Calendar is working without any issues so it is only the search in the shared calendar that is not giving results. So the result page is empty.

I have created a new outlook profile and there is have the same issue. Everything works except the search in the shared calendar.

The Office 2019 Desktop application is at the latest version so all the updates have been done . Windows also latest version.

I h ave searched on the internet and have seen that there are other users that have the same issue but i didnt found a solution.

I have already recreated the Windows Indexes but i am not sure that this is used for search in shared calendar.

Any suggestions are welcome.

Thanks