If you're using an Exchange account that requires advanced settings, you'll need to remove the account and add it again using advanced settings. To add the account using advanced settings, see Add an account using advanced setup. If you have a Google, Yahoo! Mail, iCloud, IMAP, or POP3 account, check the settings in the advanced mailbox settings to make sure they're configured to your email provider's specification. If you're using an Outlook.com, Microsoft 365, or Exchange account, you won't have advanced mailbox settings unless the account was set up using advanced setup. If your problem is how quickly mail populates, change the download preference to headers then full items.

Check your privacy settings

In the notification bar at the top of the app, select Fix account. If your password is incorrect, you'll see a message asking you to update your password. Before you begin, make sure that your device has the latest operating system and app updates. Try the general troubleshooting solutions in Troubleshooting Mail and Calendar apps for Windows 10. If that doesn't solve your issue, try the solutions below.

Allow Mail and Calendar apps through Windows Firewall

Why is Outlook 365 getting emails on my phone but not my computer?

In some cases, there might be outages or network-related issues, such as problems with a VPN. Mail flow issues can also arise out of other circumstances, such as a user having a mailbox in both Exchange Online and Exchange on-premises. In some cases, an issue might be related to MDM settings, such as restrictions on Outlook functionality, or user account and mailbox settings in Exchange. Sometimes an error appears in the Mail and Calendar apps when the apps try to sync new email or Office 365 support guide calendar events. These syncing problems usually happen because of issues like a damaged Outlook profile, poor internet connection, or a corrupted OST file.

Check advanced mailbox settings

Mail flow issues can also arise out of other circumstances, such as a user having a mailbox in both Exchange Online and Exchange on-premises.It’s best to cache what they need in an offline situation (for example, 1 year), then apply the archive to beyond this point.Some of the most common issues users encounter with Outlook on iOS relate to syncing.On iPhones, it's also possible to sync calendars from mail apps such as Outlook and Gmail into the iOS Calendar app.Change the limit to 1 year, wait for the sync, check the size of the OST once Outlook confirms all sync has been completed.Learn how to troubleshoot when the iPhone Outlook app is not syncing.

When using Microsoft Teams on an iPhone, slow performance and app crashes can bring mobile work to a halt. Many issues come down to internet bandwidth or low storage space. If there's a feature you think is missing from the Mail and Calendar apps, or if a feature in isn't working properly, you can provide feedback directly to the Mail and Calendar team.

7 Customer support

Windows Defender Security Center is free security software that's included with Windows 10. If you haven't installed alternative security software, you should temporarily turn off Windows Defender Security Center. We're sorry you're having problems with the Mail and Calendar apps for Windows 10. To fix the issue, please try each of the following solutions in order. Why not limit the caching to a more reasonable 1 year, if they need to access things outside of this, they can, they just have to click ‘view messages on server’ to do so. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.

How to Fix Outlook Sync Issues in Windows?

It’s best to cache what they need in an offline situation (for example, 1 year), then apply the archive to beyond this point. Online archive can take 24 hours or more to complete, it depends on what you have it set to archive. So, comments about his email box size aside (which I cannot change or make him clean up at this time), I need this fixed really fast today. Two-factor authentication helps protect your account by making it more difficult for someone else to sign in. It verifies your identity using your password and a contact method (also known as security info). While we all use systems differently, I don’t think I have 100GB of data after working for my company almost 25 years, let alone this much email.