Exchange Connection Problems

Fix Exchange Keeps Asking for Password on iPhone or iPad

Olivia Miller Oct 9, 2026 869 views

Question details

The user's Exchange account configured on an iOS device repeatedly prompts for a password and rejects the correctly entered Microsoft account password.

How to Fix Exchange Constantly Asking for Password on iPhone or iPad

Product: Microsoft Exchange
Device & OS: iOS (iPhone or iPad)
Scenario: Syncing an Exchange email account or shared calendar on an Apple device.
Observed behavior: The device constantly requests the Exchange password, but the correct Microsoft account password is not accepted.

Before you start

Verify that your Exchange email address and password are correct by signing into Outlook on the web before modifying your iOS device settings.

Solution 1Recommended

Remove and Re-add the Exchange Account

This is the most effective solution if the saved authentication credentials on your iPhone or iPad have become corrupted.

Often, iOS caches outdated security tokens. Removing the account completely clears the corrupted credentials, allowing your device to establish a fresh, secure connection with the Exchange server.

Open Mail Settings

Go to the Settings app on your iPhone or iPad, scroll down, and tap on 'Mail' (or 'Passwords & Accounts' on older iOS versions), then select 'Accounts'.

Delete the Account

Tap on your Exchange account, scroll to the bottom, and tap 'Delete Account'. Confirm your choice to remove the synced data from your device.

Re-add the Exchange Account

Tap 'Add Account', select 'Microsoft Exchange', and enter your email address. Follow the on-screen prompts to sign in and re-authenticate.

Data Safety: Deleting the Exchange account from your iOS device will not delete your emails or calendar events from the server. They will instantly resync once you log back in.

Solution 2

Check Modern Authentication and App Passwords

Use this solution if your organization requires Multifactor Authentication (MFA) and standard passwords are automatically rejected.

Solution 3

Contact the Exchange Administrator

Use this if the prompt continues even after re-adding the account and verifying your password.

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Frequently Asked Questions

Why is my iPhone rejecting my correct Exchange password?

This usually happens due to corrupted saved credentials in your iOS Mail app, or because your organization has enabled Multifactor Authentication (MFA) and your device needs to re-authenticate via a secure Microsoft portal instead of a standard password field.

What is an App Password and how do I get one?

An App Password is a randomly generated 16-character code that bypasses Two-Factor Authentication for apps that don't support modern login prompts. You can generate one by logging into your Microsoft account's advanced security settings online.

Will deleting and re-adding my Exchange account delete my emails permanently?

No. Deleting an Exchange account from your iPhone or iPad only removes the locally cached data. All your emails, contacts, and calendar events remain safe on the Exchange server and will download again once you reconnect the account.

Can I use an alternative app if iOS Mail keeps failing?

Yes. If the native iOS Mail app continues to loop the password prompt, you can download the official Microsoft Outlook app from the App Store, which natively supports modern authentication and complex enterprise setups.

Outlook & Email Problems