Issue with fonts on Outlook for Mac version 16.110 (26061317)

Question

Issue with fonts on Outlook for Mac version 16.110 (26061317)

James Burney 130

Device affected: MacBook Air, Apple M3

Following the update to the latest version of Outlook for Mac (16.110) some of our users are experiencing inconsistencies with fonts when drafting a new email, or replying to an email.

The user can type in the default font specified under Outlook > Settings > Composing > default fonts, until they change to any other font whilst composing the message.

When the selected font is changed, Outlook will display the new font name which the user selected, but it will be using Arial font.

After a different font has been selected, the typed font will always remain in Arial, even if another font is selected.

Reinstalling fonts manually to the Font Book, and resetting fonts via Font Book advanced settings did not make a difference to the behavior.

So far the only way I've been able to resolve the issue is by rolling back to a previous version of Outlook for Mac (109.2).

This update has been highly problematic, I hope MS can fix these issues ASAP.

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2 answers

Your answer

Answer 1

This problem persists in Version 16.110.1 (26062112). I believe that it relates to the way that Outlook is now building the HTML that underpins the message.

I can see within the HTML of a (broken) message sent from this version on the Mac, that we have the following...

<div style="direction: ltr; font-family: Aptos, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">This <span style="font-family: &quot;&amp;quot;Courier New&amp;quot;&quot;, Arial, Helvetica, sans-serif;">should</span>&nbsp;be courier</div>

Notice how the inline <span> has a font-family defined, but that the attempt to put quotes around the selected font name has produced an absolute mess.

The equivalent in an email sent from a Windows machine looks like...

<p class="MsoNormal">This <span style="font-family:&quot;Courier New&quot;">should</span> be courier<o:p></o:p></p>

Interestingly, if I view the source on the Windows machine, I see...

<p class=MsoNormal>This <span style='font-family:"Courier New"'>should</span> be courier<o:p></o:p></p>

So there is a double problem with Outlook on Mac converting single quotes to doubles in received messages, and then mashing inline double quotes into ", in addition to whatever the heck it's doing when composing messages. If someone wants to pass that on to anyone that can actually fix this mess, then please do so.

Answer 2

Hin-V 16,155 Microsoft External Staff Moderator

Hi @James Burney

Thank you for reporting this issue and for providing detailed information. I sincerely apologize for the inconvenience this may have caused.

From your description, the information you shared is very helpful, and it appears that the issue is affecting build 16.110 in the New Outlook for Mac.

In this situation, I recommend using Outlook > Help > Report a Problem to submit feedback directly to the product team. This allows them to review and acknowledge the behavior, which can help prioritize a fix in an upcoming release.

Apologies for redirecting you to the related development team support. Moderators participating here do not have access to backend systems, nor can we directly intervene in Microsoft services. We truly appreciate your understanding of these limitations. We genuinely hope the information we share helps point you in the right direction, and we're always here to assist as much as we can within our scope.

If you have any additional concerns, feel free to comment below. I would be more than happy to assist.

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

Greg C 0 Reputation points

2026-06-22T12:05:25.3666667+00:00

We're experiencing the same problem since Version 16.110 (26061317) was auto installed. Reported it via the Feedback including video of the issue and diagnostics. No fix yet. Anyone have an update on this problem?
Hin-V 16,155 Reputation points Microsoft External Staff Moderator

2026-06-22T21:59:58.3933333+00:00

Hi @Greg C

I truly understand how this issue is impacting your current workflow. At this time, Microsoft has not released any updates or a new version to address the issue. I will continue monitoring the situation and keep you informed as soon as new information becomes available.

Thank you for your patience and understanding.
Alfredo 5 Reputation points

2026-07-02T08:53:37.98+00:00

Hello @Hin-V
we need some speed in fixing this problem , we cannot send properly formatted emails ( personal and work ) Please help address this issue promptly. I have also reported the problem as instructed above, but no fbks...
Ben Ford 0 Reputation points

2026-07-02T10:34:19.7933333+00:00

This issue continues on 16.110.2 (26062818)

We have observed it across MacOS 15 and 26 builds, fairly universally with the people we work with. It is unclear what fixes where included in the last 3 builds based on the release notes, but I can confidently say resolution to this issue was not among them.
Ben Ford 0 Reputation points

2026-07-02T11:11:43.8433333+00:00

Recent chat with a support agent has them claiming this is fixed in "the upcoming Outlook update (currently in Beta)" build and we can expect a fix in some amount of weeks they could not specify.

Fingers crossed