If Outlook still doesn’t sync, create a new mail profile. Head to Control Panel → Mail → Profiles → Add and add your account credentials again. A corrupted OST file can pause your business communication, but with these repair steps you can restore your Outlook in minutes. Follow each method carefully, keep your account synced to Office 365, and maintain regular backups to avoid future data loss. You’ll see files ending with ".ost" — these store your cached mailbox data. Yes — Outlook will re-sync mailbox data from the server once you relaunch the app, as long as you use an Exchange or Office 365 account.

This ensures smoother delivery even during solve Office 365 mailbox sync delays network drops. Navigate to Send/Receive → Work Offline and toggle it. If Outlook reconnects successfully, the OST issue was likely caused by temporary disconnection from Office 365 servers.

It includes a listing of your accounts, autocomplete information, and your name and initials. To repair your Outlook profile or create a new one, see Fix your Outlook email connection by repairing your profile. Go to your Outbox and then open the stuck email message

Per the article below I updated the Ethernet drivers on the the server to the most recent version and the MTU was automatically set to 1500. Not sure why only certain machines were affected but at this point I’m keeping my fingers crossed. Turning off cached Exchange mode works, but the connection seems to be spotty as Outlook will freeze up after a while. Rebooting, deleting the OST and/or mail profile does not have any effect. Things work well for a number of days or weeks but the problem reoccurs eventually. For those utilizing the classic (old) Outlook application, this section addresses issues specific to this versio

If the self-help doesn't solve your problem, scroll down to Still need help? Articles, examples, tutorials, and inspiration from our emailing experts. Create your account and connect with a world of communities. Find solutions to common problems or get help from a support agen

Hence, the trashing of messages is registering on Gmail. It's just that the contents seem completely disconnected from what I see using webmail. All messages that were trashed in Outlook still appear in All Mail when accessed using webmail, even days later. From what I’m reading, this doesn’t actually appear to be an issue with receiving email, it’s an Outlook screen refresh issue, or possibly (although less likely) an issue with notification setting

Sign up for tips and industry insights to level up your emailing solve Office 365 mailbox sync delays skills. Outlook lets you block a sender or a domain in just a few clicks. This is a great way to protect your inbox from spammers and cyberbullies. If an email triggers the spam filters, Microsoft automatically moves it to your junk folder. And in most cases, that’s where it belongs. For more information on creating a new email profile, see Create an Outlook profil

If you’re confident your credentials are correct and the sign-in still fails, proceed to the next step for deeper inspection of license status and subscription details. Microsoft 365 is a vital tool for many businesses, and login issues can significantly disrupt day-to-day operations. In this guide, we will take an in-depth look at troubleshooting and solve Office 365 mailbox sync delays resolving common Microsoft 365 login problems so you can keep your business running smoothl

Simply open the Office app normally, and all your files are saved locally until internet access resumes. For cloud-based services like Outlook or OneDrive, offline access won’t work until you sync online again. Make sure to save any updates for immediate syncing once a connection is re-establishe

For some users, e-mails do not arrive without manually sending and receiving them. If you are having sync issues, you can force a manual sync by selecting the Sync button via the View tab on the Ribbon. A status message appears at the bottom of the message list while Outlook is syncin

Incorrect send/receive intervals often delay inbox updates. Go to File → Options → Advanced → Send/Receive and set automatic send/receive every 5 minutes for best performance. Large mailbox sizes, unstable network connections, and abrupt shutdowns are the leading causes of OST corruption. Microsoft provides a built-in tool called SCANPST.EXE to scan and repair minor OST corruption. Chat with our experts or create a support request now.

See the attached picture for the Properties window for a user-created folder. When you right-click one of the folders that doesn't show new mail unless you select it, Properties, is the box 'When getting new messages... It's usually not checked by default for IMAP to minimize network traffic. Subscribing to a folder makes it appear in the Folder Pane, but one might not always want a folder to be synced automatically if it is mainly an archive folder or one that seldom receives new mail. This limits the amount of network traffic and improves performance for syncing important folders. But many users run into the problem where their important IMAP folders are not syncing or stop updatin