Outlook cannot connect to server means that Outlook is unable to connect to the email server. As a result, Outlook may stop sending and receiving emails, fail to synchronize folders, or repeatedly ask for your password.

This problem can be caused by internet connection issues, incorrect account settings, outdated versions, damaged profile or data file and firewall or proxy restrictions, authentication issues, or problems with mail server.

This write-up is going to explain why it happens and how to fix the “Outlook disconnected from server” issue with practical methods.

Table of Content
  1. Why Does Outlook Not Connect to Server?
  2. How to Fix “Outlook Cannot Connect to Server” Issue?
  3. Method 1: Check Your Internet Connection
  4. Method 2: Turn Off Work Offline Mode
  5. Method 3: Verify Account Credentials and Accuracy
  6. Method 4: Restarting Outlook in Safe Mode
  7. Method 5: Update Outlook and Microsoft 365
  8. Method 6: Repair Outlook Profile
  9. Method 7: Repair Data Files to Fix “Outlook Disconnected from Server” Issue
  10. Conclusion

Why Does Outlook Not Connect to Server?

  • Network problems: Improper internet connection may affect Outlook’s ability to connect to the email server.
  • Inaccurate Configurations: Inaccurate or misconfigured server configurations in Outlook, including ports, server addresses, and security settings, may prevent communication.
  • Server Issues: Outlook’s inability to establish a connection may be the result of maintenance, outages, or other technical problems with the email server. It causes the Outlook cannot connect to server error.
  • Software or Firewall Interference: Firewalls, antivirus software, or other security applications may obstruct Outlook’s connection to the server, resulting in the error.
  • Outdated Software: Occasionally, using an out-of-date version of Outlook can cause problems with server setup compatibility.
  • Profile or Add-in problems: Incompatible add-ins or extensions or corrupted Outlook profiles might cause connectivity problems.
  • TCP/IP Protocol Stack Issues: Outlook and the email server connectivity issues can occasionally be brought on by issues with the computer’s TCP/IP protocol stack.

If everything is properly working and updated then this error could happen because of damaged data files. Let’s jump to the techniques to resolve “Outlook not connecting to server”.

How to Fix “Outlook Cannot Connect to Server” Issue?

We can resolve this “Outlook disconnected from Exchange server” issue by checking internet connection, updating outdated versions, turning off work offline mode, restarting Outlook, reconnecting the account, etc. We will describe everything in upcoming sections:

Method 1: Check Your Internet Connection

We will start with basic steps; you will not be able to connect to any servers if there is a network issue or if it is down. In these situations, you must confirm that you are connected to the network and ensure that your internet connection is working properly.

  • Try to connect the same network with a different device. Try to open Outlook on the device where it’s installed and see if it functions properly now.
  • If you are using a public network, you can try a private one.

Method 2: Turn Off Work Offline Mode

Sometimes Outlook cannot connect to server because it has been placed in offline mode.

  1. Open your Outlook.
  2. Click on “Send/Receive”
  3. Locate Work Offline.
  4. If it is enabled then disable it.
  5. Wait for the process.

Method 3: Verify Account Credentials and Accuracy

Make sure your account information and exchange server name are accurate; if not, Outlook cannot connect to server when you use this program.

To validate your Outlook account credentials, take the actions listed below.

  1. First, Launch Outlook on your PC.
  2. Second, go to the “File” >> “Info” >> “Account and Social Network Settings” >> “Account Settings”.
  3. Finally, select the account from the dialog box, delete the current account, and enter your login information again.

Method 4: Fix “Outlook Cannot Connect to Server” by Restarting Outlook in Safe Mode

Sometimes third-party add-ins can cause “Outlook not connecting to server” error. Starting Outlook in Safe Mode can disable all third-party add-ins and make process smooth.

  1. Use Windows + R keys.
  2. Type: Outlook.exe /safe.
  3. Hit the Enter button.
  4. Now check whether Outlook connects to the server or not.

If Outlook works correctly in Safe Mode, then add-ins may be responsible for this error. You can disable them by going to File tab >> Options >> Add-Ins >> COM Add-Ins >> Go option.

Method 5: Update Outlook and Microsoft 365

Outdated Outlook versions may also affect performance and cause “Outlook cannot connect to server” error. Follow given steps to upgrade editions:

  1. Go to “File” >> “Office Account” in Outlook.
  2. Choose “Update Options”.
  3. Click on “Update Now” option.
  4. Allow Outlook to install available updates.
  5. Finally, restart your Outlook.

Method 6: Repair Outlook Profile

You can attempt to fix your Outlook account if you are still unable to establish a connection to the Outlook server. The following are the ways to fix your Outlook account.

  1. Firstly, launch the Outlook application on your system.
  2. Secondly, navigate to “File” >> “Info” >> “Account Settings” >> “Account Settings”.
  3. Lastly, select your account and click Repair to fix “Outlook cannot connect to server”.

Method 7: Repair Data Files to Fix “Outlook Disconnected from Server” Issue

If everything is working smoothly without any issues and you are still facing “Outlook not connecting to server” then it may be due to damage file. So, users can use SysTools OST Recovery Tool to fix OST data file and SysTools PST Repair Tool for a corrupt PST file. These tools help to recover complete data into healthy formats.

Users can download demo version for free to fix “Outlook cannot connect to server” error. If both files are damaged then you can go for OST Recovery Pro, which helps to fix corruption of both files.

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Conclusion

We have explained best techniques to fix “Outlook cannot connect to server” issue by checking internet connection, verifying account details, opening Outlook in safe mode, and repairing your profile. If it happens due to damaged data files, then use smart solution. It helps to fix files and recover complete data into healthy format.