Having trouble connecting to your email from Outlook on your desktop? Follow these steps to let Outlook diagnose and fix errors in your Outlook mail profile that might be causing the issue.
Repair a profile in Outlook
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In Outlook, choose File.
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Choose Account Settings > Account Settings.
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On the Email tab, choose your account (profile), and then choose Repair.
Note: The Repair option isn't available if you're using Outlook 2016 to connect to an Exchange account.
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Follow the prompts in the wizard, and when you're done, restart Outlook.
You can also run Office update to make sure you have the latest updates for Outlook and other desktop apps for Microsoft 365: Install Office updates.