Microsoft 365 automatically applies superscript formatting to the ends of ordinal numbers, which are numbers that show the relative position of something in a sequence, such as 21st, 22nd, 23rd, and so on.
Here's how you can stop the automatic formatting by canceling superscript mode.
In PowerPoint
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Select File> Options.
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Select Proofing, and under AutoCorrect options, select AutoCorrect Options.
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On the AutoFormat As You Type tab, clear the Ordinals (1st) with superscript check box to prevent the app from applying superscript formatting to numbers.
In Outlook
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Select File> Options > Mail > and under Compose messages, select Editor Options.
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Select Proofing, and under AutoCorrect options, select AutoCorrect Options.
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On the AutoFormat As You Type tab, clear the Ordinals (1st) with superscript check box to prevent the app from applying superscript formatting to numbers.
See also
Configure or turn off automatic text formatting (AutoFormat)
In PowerPoint
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On the PowerPoint menu, select Preferences, and then select AutoCorrect.
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On the AutoFormat as You Type tab, clear the Ordinals (1st) with superscript check box to prevent the app from applying superscript formatting to numbers.
In Outlook
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In the body of an email message, type an ordinal number, such as 1st.
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When the number is automatically converted to superscript, click the blue underline, click the AutoCorrect button, and then select Stop Automatically Superscripting Ordinals.
Caution: This will permanently disable automatic superscripting of ordinal numbers. To cancel superscripting on a case-by-case basis instead, click Undo Superscript on the AutoCorrect menu that appears after Outlook automatically applies superscript formatting, or press
