It's on the 'Menu Bar' Edit > Find > Search Messages

Cannot see 'Menu Bar' containing File, Edit, View, etc? Maybe you need to enable the 'Menu Bar'. Menu app icon (on Unified Toolbar - it has 3 lines) > View > Toolbars > Menu Bar

Since Thunderbird updated from 102* to 115*, the Menu app icon no longer has many of the options it had before, so you will find it's become important for the Menu Bar to be visible.

In previous versions the search bar at the top of the screen was an advanced search. Now it open a search tab that only searches the body of messages

In previous versions the search bar at the top of the screen was an advanced search. Now it open a search tab that only searches the body of messages.

You said : I can still access it from Control/Shift/F Advanced Search That type of search is accessible from the same location and that is the same information I already posted. It searches on a lot more than the body. It is an advanced search performed in a separate window, so it can search on various things that are not available on the other two types of search including various aspects of the headers not available in other types of search.

Global Search The 'search bar at the top of the screen' is called the Global Search' and it opens using Control/K The 'Global Search' is located on the Unified Toolbar. Global Search will search for whatever you inserted in the Global Search and it will search ina ll accounts and all fodlers that you have selected to allow a global search. By default most folders are selected, but usually junk and trash are not included. If you do not see it automatically then it's likely you have either disabled it or removed it from the toolbar. You can Customise the toolbar and put it back. If you have switched it off then enable it again:

• Settings > General
• Scroll to bottom and select checkbox : 'Enable Global Search and Indexer'

Quick Filter Search Info : https://support.mozilla.org/en-US/kb/quick-filter-toolbar The Quick Filter Toolbar has the 'Quick Filter' search option. You can make that toolbar appear by clicking on the 'Quick Filter' button located on the 'Message List Header' toolbar. It can be accessed using Control/Shift/K (not F) Type some text in search and it offers to search messages containing the word or if you have entered part of email addess then it also offers to check relevant email addresses. It will offer a small selection of filters but you have to select the ones you require. eg: Sender, REcipient, Subject. Body.

The 'Quick Filter' button to make the Quick Filter toolbar appear is by default on the 'Message List Header' toolbar. If you have decided to disable that toolbar you can open it again. Menu app icon > View > Layout > 'Message List Header'

OR you can Customise the top Unified Toolbar to display the 'Quick Filter' button. Rigth click on Unified toolbar and select 'Customise'.

So you use the appropriate type of search depending upon what it is you require.