InDesign Not Recognizing Calibri After Windows Update

Hi folks.

Like Tom and others I have also been impacted badly by this issue with hundreds of form fields for client projects broken.

Thankfully I have found a fix which appears to resolve the issue by exporting to IDML and editing the Fonts XML directly -- not as difficult as it sounds. I understand others are having issues with Times New Roman and possibly other Windows System fonts. I haven’t tested those cases but hope the same process applied to other fonts can clean up those issues for you as well.

Here are the steps I followed:

1. Use Find/Replace Font to remap Calibri (OTF) to Calibri where it can be remapped. If you have no text in Calibri (i.e. form fields only) probably a good idea to add some temporarily to the document to make sure the correct version of Calibri is registered in the document.
2. Save the file to IDML.
3. Rename the .idml file extension to .zip
4. Unzip the archive
5. Browse to the Resources folder and open the Fonts.xml file with a text editor
6. Find the <FontFamily> tag which contains the Name=”Calibri (OTF)” property. It should be followed by another <FontFamily> tag with Name=”Calibri”, assuming you have some correctly mapped Calibri text in your document as well (see Step 1). 
7. Delete the entire section, from the opening <FontFamily Self=”xxxxxx” Name=”Calibri (OTF)”> tag to the closing </FontFamily> tag.
8. Save the file.
9. Pack all of the files and folders you unzipped in Step 4 into a new .zip file (don’t accidentally include the original zip file, if it is still in the same location as the files and folders you unzipped). Name it as you like, e.g. YourProject_Clean.zip
10. Change the file extension of the new zip file to .idml
11. Open the IDML file in InDesign. If you have trouble opening it check carefully that the new IDML file’s contents (viewed by changing the extension to .zip) match the contents of the one InDesign created for you in Step 2.
12. Save your converted IDML file to a new InDesign file.

This has at least for me resulted in clean files with all form fields correctly mapped to whichever style of Calibri was originally applied before the update. 

I really hope these steps work for others. Please post if you have success!

Any updates? Same problem here and it is very anoying.

Any updates?

On my PC I had the .ttf files for fonts and the others had .ttf with .otf variation in the file info. Mine did not have .otf variation noted in my files info. When my other coworkers “fix” the fonts and save a file its ends up all pink for me. If I “fix” the fonts and save it then shows up pink for them. 

Also Segoe UI Emoji seems affected…. aargghhh
Now also my ebook covers are an issue and I desperately need to make changes.

We are having the same issues with Roboto font family on PCs. Our mac users are not affected. 

The only way I’ve found to resolve the issue is by removing Windows 11 updates every five weeks, which seems to be the limit. This has been happening since November 2025, and I am responsible for several devices facing the same problem. I urgently need a solution!--endfragment>!--startfragment>

Having the same problem. It started today, pink highlighting all over my ebooks and Adobe not recognising Calibri. I ran a Windows update yesterday afternoon. Tried updating the font just now, nothing seems to work. What's funny is that yesterday Adobe didn't have an issue, but the epub I made from the ebook looked all funny; everything showed up in italic. Now I know why. Would rather not have to change ALL my documents. This is a freaking nightmare as far as I'm concerned.

I’ve got the same problem. I downgraded to InDesign 2025, and for now it works. The 2026 version keeps having major problems. Previously, I couldn’t save many InDesign files...for no apparent reason. It would give an error and keep crashing. I’m sticking with 2025 until the problems are resolved...

It's quite frustrating that there is no solution to this seemingly simple problem. Unfortunately, the brand of one of our company's main client is based on a system font (Calibri), so this is about as inconvenient for us as having to re-set the car infotainment system before starting everytime because it forgets all main settings by turning off the ignition. I don't know if this is a problem on Microsoft's or Adobe's side, but something went wrong, and the lack of a solution is frustrating.

I've tried everything above, below and beyond, without success. I haven't tried it on a Mac yet, it's worth a try tonight, I'll write if the end result is different.