The outlook may not load or function properly for a variety of reasons. These are some of the reasons:

• There are problems with the Outlook service.
• Problems with internet access
• There is an issue in the app that necessitates an update.
• Update problems with the app
• Add-ons that are outdated or broken
• Outlook PST file that is corrupted or defective
• A tainted profile
• There are some issues with the navigation pane.

I hope this answer will help you to solve your query

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