Hi,
What does "365 mail" refer to in your description? You mean the Outlook desktop application come with your Office 365 plan or the Outlook 365 online app?
Could you define "mail auto-corrects/shortcuts" so that we can understand the problem more clearly? If you mean the AutoText/Quick Part feature in Outlook desktop application, these settings are stored in Outlook NormalEmail.dotm template. It could
be that the template was corrupted. You may try recreating the NormalEmail.dotm file and recreating your AutoText/Quick Part to fix the issue.
Please provide more details if we have misunderstood something.
Regards,
Steve Fan
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