Exchange Connection Problems

How to Remove an Exchange Account and Add Microsoft 365 in Outlook

John Wilson Sep 29, 2026 868 views

Question details

The user needs to remove an improperly configured Exchange account and replace it with a Microsoft 365 account in Microsoft Outlook.

How to Remove an Exchange Account and Add Microsoft 365 in Outlook

Product: Microsoft Outlook
Device & OS: not provided
Scenario: Reconfiguring the Outlook email client after it was connected to the wrong Exchange account.
Observed behavior: Outlook is connected to an incorrect Exchange account. It needs to be disconnected and properly authenticated with a new Microsoft 365 account.

Before you start

Verify that all personal mail and local data synchronized with your current Exchange account are safely backed up before removing it from Outlook.

Solution 1Recommended

Remove the Exchange Account from Account Settings

Use this method if the Exchange account is not your only account and not tied to the default data file.

If you have multiple accounts configured, you can easily remove the incorrect Exchange account directly from the Outlook interface and add the Microsoft 365 account in its place.

Navigate to Account Settings

Open classic Outlook, click on 'File' in the top-left corner, select 'Account Settings', and then click 'Account Settings' again from the dropdown menu.

Remove the Exchange Account

Under the 'Email' tab, select the Exchange account you wish to remove and click 'Remove'. If prompted with a warning about personal mail or data file locations, ensure you have backed up your data, then confirm the removal.

Add the Microsoft 365 Account

Still in the 'Email' tab, click 'New'. Enter your Microsoft 365 email address and follow the prompts. Outlook will use Autodiscover to configure the Microsoft 365 account automatically.

Remove the Exchange Account from Account Settings

Default Account Restriction: If you receive an error stating the primary account cannot be removed, you must create a completely new Outlook profile instead.

Solution 2

Create a New Outlook Profile

Use this method if the Exchange account is the default or only account in your Outlook profile.

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Frequently Asked Questions

Why does Outlook warn me about data files when removing an Exchange account?

Outlook stores a local cache of your emails in an OST or PST data file. The warning alerts you that removing the account will disconnect Outlook from this data file. As long as your emails are synchronized with the Exchange or Microsoft 365 server, no data is permanently lost.

Can I have both an Exchange account and a Microsoft 365 account in the same profile?

Yes, Outlook allows you to configure multiple Exchange and Microsoft 365 accounts within the same profile, provided they use different email addresses and login credentials. You can simply click 'New' in Account Settings to add the second account.

Why can't I remove my Exchange account directly?

If the Exchange account was the first account added to Outlook, it serves as the primary account that dictates the default data file. Outlook design prohibits deleting the primary account directly; you must create a new profile through the Windows Control Panel to bypass this.

Outlook & Email Problems