After a minute, it was removed so just went and re-added it and BOOM. One other thing I would check for is corrupted OST files. Turn off cache mode, delete or rename the OST file, and then turn cache mode back on.

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Furthermore, when calendar invites are accepted using the Outlook client, they disappear from All Mail and go into the Trash folder, but when using WebMail, they remain in the Inbox. I have seen this disparity for years across different Outlook client versions and Windows versions. I also posted on fix MFA prompts not working the Gmail subreddit about a year ago.

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We are a relatively small company so instead of purchasing exchange or using hosted exchange, we decided to use GoDaddy for standard pop/imap email accounts to save on the cost. If these methods do not work, then contact the support team of your email provider. So, here are the solutions you solve the problem of fix Outlook after Windows update issues the IMAP folder not syncing.

Chosen solution

I have all desktop alerts turned off I prefer it this way I don't need all of that. I just want to be able to look and see new message. Even if I have an account with zero message I need to click to see the new ones there are no numbers appear. I am also running QuickFolders and its the same nothing shows up on those tabs until i physically click on them. Ok so my mistake the Properties option is there when right clicking folder - I was only focused on right clicking on the email address to take me to server setting I was not clicking on the actual folder. I right click a folder and Properties and it take me to attached windows.

My accounts in Mail app stopped to sync post update

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 Outlook data file cannot be accessed IMAP folders are not syncing or stop updating.

Delete Confirmation

It will synchronize deleted items if I delete an item from my phone, but it just wont receive new ones. IMAP accounts should update automatically on send/receive. Otherwise why even have the ability to auto-sync? If I need to click on each folder to force the sync/download from server then auto sync serves no purpose. When you are accessing Gmail via the web application everything is hosted on Google's cloud servers.

• The problem can be caused by either improper settings or a damaged send/receive group within Outlook.
• Microsoft, gmail and other popular accounts should sync automatically, but if they don't, I'm inclined to think it's due to the VPN or a security/antivirus app that is scanning the TB profile folder.
• I checked on web mail here it is.one account is configured on two computers, one is configured with POP & second is IMAP.
• Decided to just try completely removing my Gmail account, the one that wasn’t syncing with the Mail App after the iOS 18 update.
• When you are accessing Gmail via the web application everything is hosted on Google's cloud servers.
• Everything works great for the most part, except with our IMAP users.

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 settings. If you can go to another folder then right back to Inbox and suddenly see 100 new messages, they were there all along, they didn’t just magically appear in that second it took to switch back and forth. Try attacking it from that angle and see what you find.



That’s why, here I am to help you in this situation by providing you with solutions. But, before that, let’s understand the cause of the issue. If I am sitting on my inbox and do a send/receive, no new mail will populate. The send and receive does not error, it looks to complete successfully. Doing a send and receive does not update the mail, and I have played with all kinds of settings in the send and receive groups but nothing seems to work.

Outlook not syncing IMAP emails

These methods help you in the synchronization process. If this does not work, you can contact your email provider. After that, it is also important to secure your IMAP folder to prevent this issue from happening in the future. So, properly follow the above steps and backup your data from IMAP folders. I am aware of the difference between Gmail's labels vs. Outlook's folders, but I would expect that Gmail does what is necessary to make the folders appear correct over the IMAP connection to Outlook. For example, if I drag a message from Outlook's All Mail folder to Trash, I see that message disappear from the Inbox folder after a short delay.