My Outlook is running very slow

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Posted on by peach_rose

Hello, from past few days my Outlook is running so slow, please help me to fix this issue.

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Dynamics 365 general

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Martin Dráb 239,022 Most Valuable Professional on at

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I'm afraid that you're at a wrong place. This forum is about Microsoft Dynamics, not Microsoft Office. Try the Outlook forum on Microsoft Tech Community.

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Nour Abuzaid 197 on at

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Hi,

Outlook running slowly can be caused by several factors, but there are effective steps you can take to improve performance:

⚙️ Troubleshooting Tips

Disable unnecessary add-ins: File → Options → Add-ins → Manage COM Add-ins

Archive or delete old emails: Large mailboxes slow things down.

Update Outlook: File → Office Account → Update Options

Repair your Outlook profile: Control Panel → Mail → Show Profiles → Repair

Clear cache and temp files: Especially useful for shared mailboxes/calendars.

Check antivirus software: Some may interfere with Outlook.

📚 Helpful Microsoft References

Outlook not responding or freezes
Covers causes like large mailboxes, outdated add-ins, and corrupted profiles.

Outlook crash or stop responding
Step-by-step guide including safe mode, Office repair, and SaRA tool.

Slow performance with shared folders/mailboxes
Explains how shared folders can impact speed and how to reduce them.

For deeper diagnostics, visit the Outlook forum on Microsoft Tech Community. Let me know if you'd like help applying any of these fixes!
https://techcommunity.microsoft.com/category/outlook

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peach_rose on at

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Thank You for your responses.

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Martin Dráb 239,022 Most Valuable Professional on at

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@peach_rosev I still think that this discussion doesn't belong to this forum at all, but when it happenned, let's do it properly.

I see you've verified an answer, but it contains many different suggestions. Which one of them solved your particular problem?

@Nour Abuzaid Please pay attention to whether a questions belong here or not, and make sure you follow Responsible AI policies of this forum.

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