Hi, this is Bryll
Thank you for writing us here in Microsoft Community.
One possibility on why this problem is happening is that there is a glitch in the email service or the phone software that prevents your password from being recognized or stored properly. Another possibility is that you have enabled a security feature that requires you to change your password frequently or use a verification code every time you log in.
Here are some strategies that we can recommend. Please adhere to the instructions in a sequential manner:
- Remove and Re-add email account within Outlook:
- Open the Outlook app on your iOS device.
- Tap on the profile icon located at the top left corner.
- Tap on the gear icon located at the bottom left corner.
- Scroll down and tap on "Settings" then tap on your email account.
- Tap on "Delete Account" and confirm the action.
- Remove and Re-add email account within iOS Settings:
- Using your iPhone, Go to its Settings > Mail > Accounts.
- Tap the email account then tap Sign Out or Delete Account.
- Uninstall Outlook application from Apple store:
- In iPhone home screen > Tap and hold Outlook application > Select Remove App
- Once removed, restart your phone
- Update iOS: Updating iOS would help if glitches or bug is being experienced.
- Go to iPhone settings > General > Software Updates > Follow prompts on how to update.
- Reinstall Outlook application:
- Go to Apple Store > Search Outlook > Click Get > Open Outlook after installed
- Re-add email account in Outlook:
- Go to iOS Settings > Mail > Accounts > Re-add your email account
- Open Outlook application and check if your email account is re-added
Should problem remain, we will recommend other strategies once we receive your response to our questions below. If possible, please send us some screenshots.
- Have you tried accessing your account from a different device or from its webmail to confirm if the issue is either device or account specific?
- Have you tried accessing your account on a different mail client to confirm if same problem would persist?
- What is the email domain of your account? Is it @Gmail @Yahoo @Hotmail or a work/school email domain?
- What is the update build of the Outlook client in your iOS mobile? Go to Outlook app settings to check
It is a pleasure to share my thoughts and potentially support your concerns.
Yours truly,
Bryll
Community Moderator