IOS Outlook App Not Downloading Messages

For Outlook for iOS stuck on “downloading your messages” with a Gmail account, use this sequence:

1. In the Outlook app, go to Settings > tap the Gmail account that is not syncing > tap Reset Account.
   • Then check whether mail starts syncing.
2. If it still does not sync, remove and add the account again:
   • Settings > select the Gmail account > Delete Account > Delete From This Device
   • Add the Gmail account back in Outlook for iOS.
3. If the account is being added as IMAP, calendar and contacts will not fully sync.
   • IMAP and POP can sync email only.
   • Calendar and contacts require a provider that supports Microsoft Exchange ActiveSync.
4. If the issue is only on the iPhone and the Gmail account works elsewhere, check whether the account has been inactive in Outlook for iOS:
   • After more than 10 days of inactivity, Outlook for iOS stops syncing until the next session.
   • After 30 days of inactivity, the app shows Please sign in and the account must be signed in again.
5. If Outlook for iOS still stays on Updating..., use in-app support:
   • Settings > Help & Feedback > Contact Support.
6. If Apple Mail on the same iPhone also has sync problems, the issue may be with the iOS mail account setup rather than Outlook. In that case, remove and re-add the account in iOS Mail settings.

A key limitation: Outlook mobile can add Gmail accounts, but it will not necessarily behave as a full mirror of desktop Outlook for every Gmail scenario, especially for calendar/contacts behavior if the account is not using Exchange-based sync.

• Can't sync calendar and contacts with my phone or tablet
• Can't sync calendar and contacts with my phone or tablet
• I haven't used Outlook for a while. Why are my messages taking a long time to sync on my Gmail or Exchange accounts?
• Troubleshoot Outlook mobile issues