How Can You Fix the Slow Outlook Problem Quickly? (Action Plan for Frustrated Users)

Why Is Outlook So Slow After the July 2025 Update? (Troubleshooting Guide With Immediate Fixes)

Feeling stuck with an Outlook that moves at a snail’s pace? There’s hope. Let’s break the problem into easy steps, helping you get back to your work with a smile. These fixes focus on simple actions that anyone can try.

What Makes Outlook Slow After the July 2025 Update?

Recent Microsoft updates, especially in July 2025, have led some users to notice sluggish Outlook performance. A major reason is the interaction between Outlook and the Microsoft Teams add-in—when Teams is out of sync or has compatibility hiccups, Outlook gets bogged down. Outdated versions, old add-ins, and large mailbox files can add to the problem.

Solution 1: Update Microsoft Teams

The Teams plug-in often causes Outlook to struggle if it needs an update.

1. Open Teams. If you see an “Update” notice at the top, click it.
2. Allow Teams to restart after the update finishes.
3. Restart your computer once.

This may help Outlook speed up right away.

Solution 2: Update Outlook to the Latest Version

Out-of-date apps can be slow and buggy.

For Classic Outlook

1. Open Outlook.
2. Go to the File menu.
3. Click Office Account.
4. Choose Update Options, then pick Update Now.

For the New Outlook

1. Open the Microsoft Store app.
2. Go to Library.
3. Find Microsoft Outlook in the list and click “Update.”

Check your email again to see if performance is better.

Solution 3: Run Outlook in Safe Mode

Safe Mode temporarily switches off all add-ons.

1. Hold the Windows + R key.
2. Type outlook.exe /safe and hit enter.
3. See if Outlook runs smoothly in this mode.

If it does, it means one of your add-ons might be slowing things down.

Solution 4: Turn Off Outlook Add-Ons

Some add-ons slow down startup and daily use.

1. Open Outlook (classic version).
2. Click File > Options.
3. Go to Add-ins.
4. Click Go next to “COM Add-ins.”
5. Uncheck every add-in, then click OK.
6. Restart Outlook.

Re-enable each add-in one at a time later to find the troublemaker.

Solution 5: Go Back to Classic Outlook (If Needed)

If the new Outlook continues to be slow, switch back to the classic version. It’s reliable and less likely to stutter after recent updates.

More Simple Tips to Keep Outlook Fast

• Clear out old emails and attachments, especially ones with large files.
• Make sure your Windows operating system has all the latest updates.
• Check that you have enough free storage space and memory.
• Run a repair on Office via your computer’s “Programs and Features” menu if nothing else works.

Following these practical steps should make your Outlook run smoother and save you from wasted time or stress. Each tip is easy, requires no technical skills, and helps keep your mail and meetings moving along. If issues continue, consider reaching out to Microsoft Support for specialized help.