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Outlook Not Connecting To Office 365 Mac

While sending an email from your Outlook mail account, you may encounter the error code “Outlook cannot connect to Outlook 365”. This issue usually occurs due to connection issues, incorrect credentials, outdated software, or minor technical glitch. Whatever the reason is, a few troubleshooting solutions can help you resolve the problem. We have analyzed the issue from various perspectives and compiled this web page to help you fix Outlook that fails to connect to Office 365. Try out these hacks and ensure they work at their best.

Outlook Not Connecting To Office 365 Mac

Check The Fundamentals

  • Before you go ahead with the advanced troubleshooting techniques, it is recommended to check the fundamentals first. Check whether you are connected to a stable Internet connection. If not, fix it first and then try to connect to Office 365.
  • Verify whether the date and time settings in Outlook are correct. If they are incorrect, update the details and then check if your problem is rectified.
  • Technical glitches can be a significant reason behind the issue. A simple restart can solve the trouble efficiently. Therefore, restart your computer and check if this trick works.

Update Outlook

Older versions of Outlook may not be able to connect to Office 365. The solution to this problem is updating the app to the latest version. Here’s the procedure for updating the app.

  • On your computer, open the Outlook app. Click File > Office Account > Update Options > Update Now in the upper left.
  • Wait until the program detects the latest version. Then follow the instructions to update Outlook.
  • Reopen Outlook and see if it works.
Update Outlook

Repair Outlook

If you configure your Outlook account with improper settings, Outlook will not work as expected. As a result, it might not connect to Office 365. Therefore, you should check your account settings and make any necessary changes. For detailed instructions, follow these steps:

  • Open Outlook and click File.
  • Click Account Settings and pick Account Settings from the dropdown menu.
  • Select your account and click Repair > Next.
  • Follow the on-screen instructions to repair your account. Reopen Outlook and make sure it can connect to Office 365.
Select Your Account And Click Repair

Remove Unnecessary Add-ins

A defective add-in can break Outlook’s connection to the Exchange server. Follow the steps below to remove unwanted add-ins.

  • Click File > Options > Add-ins. Make sure the Manage option is set to COM Add-ins, and click Go.
  • Disable unnecessary add-ins and click OK.
  • Some add-ins are essential to the functionality of Outlook, so don’t disable those which are essential.
Click Go

Reinstall Office 365

In some cases, reinstalling Office 365 can fix the trouble. These are the instructions you should follow.

  • Open your computer’s Control Panel.
  • In the View by option, click Category and select Uninstall a program.
  • Right-click Microsoft Office 365 and select Uninstall.
  • Go to the official website of Office 365 and log in to your account with the proper credentials.
  • Click Install Office and select Office 365 apps to download Office 365.
  • After downloading the file, follow the instructions to install it on your computer. Once done, reopen Outlook and see if you can connect to Office 365.
  • For more troubleshooting solutions, click here.

Click Install Office


We hope these troubleshooting techniques have helped you fix the “Outlook not connecting to Office 365” issue. If you still cannot handle the trouble, connect with us to talk to specialized engineers. They will assist you in real-time and help you rectify the problem in the best way possible. You can reach us via the Call button on this page.

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