INT-IMAP: Troubleshoot IMAP Email Issues on iOS Devices

Before getting started, ensure you have the correct password by signing in to your mailbox from a web browser (preferably on a laptop or desktop computer).

1. Verify you username and password

1. Visit https://owa.msoutlookonline.net/
2. Enter your full email address in the Login (email) box
3. Enter your password in the Password box
4. Click the LOGIN button

If it worked, please move on to the next step. Otherwise, click the "Forgot password?" link to reset your password.

If you have trouble with two-factor authentication while resetting your password, please contact support and they will reset your password for you. Include a phone number where we can text you a security code and an alternate email address (e.g., Gmail, Yahoo, AOL, iCloud, Proton).

2. Delete your mailbox

Use these instructions to delete your mailbox from your iOS device: https://support.37solutions.com/hc/en-us/articles/115003888293-How-To-Delete-An-Email-Account-On-iPhone

3. Add your mailbox

Read these instructions to add your mailbox to your iOS device: https://support.serverdata.net/app/articles/detail/a_id/10271/kw/iphone%20imap

Settings

Type: IMAP (do not select POP/POP3)

Server: {varies; check your welcome email for this pattern "mail###-#.exch###.serverdata.net"}

Incoming Port: 993 (use SSL, not STARTTLS)

Outgoing Port: 587 (use STARTTLS, not SSL)

Source: Add and remove email accounts on iPhone