Those are out of reach when Outlook can’t connect live to Microsoft Exchange. Sometimes, updates can also lead to certain issues with the programs installed on Windows OS. Therefore, if there are any pending updates related to MS Office or Outlook, you should check and install them. You can follow these methods to troubleshoot and resolve the Outlook solve Office 365 mailbox sync delays stuck in Offline Mode error. These methods work in Outlook 2010, 2013, 2016, and 2019.

Check OST file

• In doing so, you would switch the mapped drive status to "online" and access to the entirety of drive's content would then be possible/granted.
• In this guide, we've discussed the reasons that can cause the 'Outlook stuck in offline mode' issue and methods to troubleshoot and resolve it.
• Perfectly repair and recover corrupted Outlook PST & OST files.
• Old versions of Outlook or Microsoft Office often trigger synchronization issues.
• Confusion happens when a device hooks up to more than one Office 365 environment.
• For example, it may happen when there is a problem with your profile on the mailbox server or if your mailbox is deleted or disabled.
• However, when Outlook cannot connect to the Exchange server, it automatically switches to Offline mode.

When offline, the status is displayed in the status reset cached Exchange mode bar at the bottom as Working Offline or Disconnected. Just having a simple update routine and checking build numbers from time to time can save a lot of trouble. Staying current with updates is probably the easiest way to keep Outlook connected.

How To Fix Outlook Stuck in Offline Mode?

When you keep everything updated, you cut down on the chances of file corruption. A lot of offline mode headaches actually start with outdated builds and unreliable OST handling. If Outlook refuses to come back online, you’re probably looking at a profile issue, a bad OST file, or a mix-up with your Exchange account setup. Fixing these directly usually brings things back to normal. Confusion happens when a device hooks up to more than one Office 365 environment.

Verify Work Offline Button Status

If you skip patches, the client might stop connecting to Exchange Online or on-premises servers. By keeping unnecessary connections out and your profiles tidy, you keep Outlook connected to the right Office 365 environment. Don’t let secondary Exchange servers manage your device if you don’t have to. Accepting those prompts can shift control away from your main email domain and cause more offline issues. Sometimes Outlook connects to the wrong Exchange environment because of Autodiscover confusion, especially if your computer has several Office 365 or Exchange accounts. Setting up the Exchange account by hand avoids this.

Method 1: Reset 'Work Offline' to Reconnect

If you set up your Outlook profile wrong, it might not log in to Microsoft Exchange or Office 365. Sometimes, people connect their system to several Office 365 environments without realizing it. That can confuse Outlook, especially with Autodiscover, and you end up stuck offline. Reconnect Outlook by checking your connection, disable work offline mode, and relaunch app.

Download Stellar Converter for OST

Autodiscover might send Outlook to the wrong Exchange server, so you can’t get to your mailbox. Damaged Outlook data files, like the OST file, can also get in the way. When these files go bad, Outlook can’t talk to the Exchange server, so it just gives up and goes offline. Now, on your keyboard, press the Send/Receive button. Old versions of Outlook or Microsoft Office often trigger synchronization issues.

Setup Exchange Server Account Manually

Given below are just a few examples of possible reasons. Select Work Offline from the Send/Receive tab in Outlook to reconnect. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.



Identify the cause of this error before restoring Outlook back to online mode. A corrupt or damaged Outlook profile can prevent Outlook from authorizing and connecting to the mail server. Due to this, we get an error usually called Outlook stuck in offline mode. Outlook automatically switches to Offline mode when it can't connect to the Exchange server. Users can also use the visit the following page 'Work Offline' option when the internet connection is not reliable.