How to change my mobile Outlook font back to calibri?

Thanks! I hope they actually make this possible without a workaround soon.

There is a work around.

1. Create a signature that includes a nominal starting word, like Dear and then your desired spaces. The signature option allows you to use whatever font you want from those available, or copy from an email from your desktop.
2. Start your emails in the signature after the nominal starting word. This will leave a line or two at the top but so what?

All users urgently request Microsoft Outlook App to have the ability to customize the font.

Has this been rolled out yet? I do not see the option for setting a default in the mobile app. How do I get the default set to Arial 11. iPhone 14.

I had this issue and just found this thread. Now, I do see that, apparently, Microsoft is fixing this terrible issue with their mobile app. Not sure why it took so long or even why choosing the font for emails was not implemented from the beginning. In the meantime, until they fix this, I found a workaround that is pretty easy to use, but you need to be able to use Outlook on a computer, unless your signature is already the correct font.

If your signature is the font you want, for example, you end your email with "Best regards," and the font is Arial 10, then you can go to your signature on Outlook on your mobile and go to 'Settings' and then 'Signatures'. From there, select after the 'B", type 'Hi" or however you start your emails, and then hit return twice and type 'B' so it says 'Best regards,' again. Select in between 'BH' and delete the 'B'. Now when you compose an email, the email will start above your signature, just select in front of 'Hi' and press backspace twice to delete the two lines that get inserted above your signature. Then you just start your email after 'Hi'. This will then compose your email in whatever font you want by using your signature font and override the 12 point Aptos font that Microsoft thinks looks nice in emails.

If you do not have your signature starting with the font you want your emails in, then you just need to go to Outlook on the computer and add this to your signature. Then you should be able to do the workaround.