Microsoft 365 update makes Thai font in the Outlook /Excel very tiny

Question

It seems there is an update on microsoft because suddenly everyone reported that the Thai font in outlook and excel are very tiny.

Currently we use this fix from 2024 and it works for outlook

https://learn.microsoft.com/en-us/answers/questions/4685324/microsoft-365-v2405-update-makes-thai-font-in-the

However, this fix does not apply to Excel.

Is microsoft going to fix this or it is permanantly?

Answer 1

Hi,

Thank you for sharing your question. I understand that your team can mitigate the problem in Outlook using the previously published 2024 workaround, but that the same approach does not help in Excel and you want to know whether Microsoft plans to fix this or if it is permanent.

I know how disruptive this is for Thai‑language users when message lists, previews, or worksheet text become tiny overnight, especially when it affects multiple users at once across apps.

Based on Microsoft’s forums and recent reports, this is a regression tied to recent Microsoft 365 builds that affects Thai font rendering in classic Outlook and, for some users, in Excel; Microsoft has acknowledged similar Thai rendering issues in Microsoft Q&A threads, where the Outlook‑specific workaround from 2024 helps only in Outlook and not Excel.  The current guidance from Microsoft and community moderators is to use app‑level mitigations such as switching to the new Outlook interface, adjusting classic Outlook view fonts, or temporarily rolling back to a prior Microsoft 365 build while Microsoft investigates and ships a fix; Excel does not yet have an equivalent one‑click mitigation beyond display and font adjustments, and affected tenants often need to wait for an Office update on their channel.  Separate Microsoft Q&A threads have also documented Thai rendering problems in Excel UI surfaces, reinforcing that this is an Office rendering issue rather than individual files, with resolution expected through future updates rather than permanent behavioral change.

 

I hope this helps.

 

Best Regards,

Noel