I have a bunch of template letters that I use in Microsoft Word. Basically the letters have some fillable controls throughout the letter via Developer. This makes writing letters very quick.

In order to ensure no one saves over the template when filling out the letter, I made them read only (right click on the file, properties, checked off 'read only'). It worked great.

My org just updated Microsoft 365 and now it doesn't work. Since its read only, it won't let me even put information into the fillable controls. Previously, I could but I just couldn't save it.

Any suggestions on how to get around this?