ps: I could not find a ASCII character code for Tick or X symbols.  I used Char252 for true and Char251 for false.  The result made me laugh out loud so I am keeping it.  Although a Thumbs Down for false would be better...  :)

I don't recall Richard mentioning it, but if your check boxes have a label, you can click on that too to make a change.
Yeah, that doesn't help to see the checkbox, but even with my eyes, that's not a problem.

But more to your question...

You should be able to download the file.  The Wingding file names are as follows:
    Wingdings             Wingding.ttf
    Wingdings2           Wingdng2.ttf
    Wingdings3           Wingdng3.ttf

Thank you, Jeffrey.  Unfortunately, Microsoft Windows 11 does not have Wingding2.  I searched for Wingding2.ttf and it came back with several download sites but I don't know if any of them are trustworthy.  I am in Australia so I don't know if this makes a difference to what Fonts Microsoft make available to Win.11.  I'll keep trying for ISCII code.

Thank you also to Thomas for your assistance.

It's not default with Windows 11 but it should have been part of the Office installation. I have Windows 11. It could also be called Wingdng2.ttf.  On your PC it would be in the C:\Windows\Fonts folder

@Julie Maybe the font was an oversight on your language version of Windows. Wingdings, 2, 3 are on my recent laptop with Windows 11 and Office in Spanish. In Windows 11, using Windows File Explorer (ctrl+E) if you go to folder suggested by Jeffrey, on the top left you will see a link "Font settings". See if any are checked and you may want to try "Restore default font settings". If you're using a company computer, perhaps the administrator removed certain Windows files?

I just figured it out.  This is another ploy by Microsoft to get people to sign up to Office 365.  I use a stand alone copy of Office 2021 in Windows 11 and have noticed things in Access that do not work (such as Auto Expand property).  Whilst losing a Font isn't so important, not being able to use all the properties of Access is very annoying.  So, no Tick marks in Access although I found u with two overhead dots worked in Excel and it cannot be copied across to Access.  It is weird but I will learn to work around the small issues.  PS: Font folder only shows one Wingdings.  Thanks to all for your suggestions.

OK. I "bit the bullet" as the saying goes and signed up for Office 365.  I now have Wingdings2 and Auto Expand is working.  I just have to "move with the times", LOL.

It's odd, in that I don't have the Windings problem with my Office 2021. But like you, I keep thinking it may be time to go 365 and be done with it, even though Microsoft is way down on the list of companies I like to donate to.

I'm using Office 2016, have the fonts in question. Don't see myself jumping on the 365 bandwagon for several reason. Yes there are some features that I don't have.  2 I can quickly come up with regarding Excel. One of which is available on the Office 365 Free or whatever it is.  The only problem is as time passes my 2016 will be more and more obsolete(ish). Not much has changed but...

@Jeffrey K. It's a tough decision for a developer. We may want to remain backwards compatible, meaning develop on an older base version and hope that it will work on the newer. Or go with 365 which will supposedly always be up-to-date, more standardized, bugs gone that will allow use of certain features. However, then insisting that clients too abandon their existing version and pay the piper. I'm on the fence.

Any ideas from the peanut gallery?

Only need a paid license for developing
Users can update to any Runtime

@Alex One of the reasons I decided to go with Access: a lot of users I deal with consider themselves data analysts. They want to manipulate the data 100 ways and back. While most aren't ready to create a proper relational database, much less all the required jobs (what I call a piece of an application, usually called from a menu), they can master queries and reports without too much training.

It would be nice if Microsoft had an option to add those two (selection queries and reports) to a Runtime, without letting the users get into the design of tables, forms or code. I'm working on this control for the full version, but I don't think I can keep them out of dynamic, delete and update queries.