How to Fix Office 365 Not Syncing With Outlook?

Are you facing a problem with Office 365 not syncing with Outlook?

If so, then you have landed to the right platform!!

There might be many instances or scenarios when you need to sync Office 365 with Outlook. One of the reasons could be you want to have the same interface with two accounts. This is so that you don’t have to switch over again and again.

However, technically the cause could be if your Exchange administrator has enabled multi-factor authentication for your Office 365 account but not enabled modern authentication.

In such a case, the system shows an error ‘HTTP 456 authentication error’.

Given below is the screenshot of the scenario when the user faces a problem in syncing Office 365 with Outlook account:

Technique to Fix Office 365 Not Syncing With Outlook

In order to overcome the above situation, the admin can disable the multi-factor authentication and enable the modern authentication.

The following are the steps to disable the multi-factor authentication and enable modern authentication:

1. Go to the Office 365 portal and login into the account by using Admin credentials.

2. Select ‘Admin’ from the main page of Office 365.

3. Go to the navigation pane and select ‘Users’ followed by ‘Active Users’.

4. In the ‘Active Users’ tab, select the option ‘More’ followed by ‘Multi-factor authentication setup’.

5. From the available checkboxes, select the checkbox of the affected user.

6. Now, click on ‘Disable’ in order to disable the multi-factor authentication.

7. Now, the admin needs to enable the ‘modern authentication’.

It is to be noted that ‘modern authentication is set as enabled in the new versions of Office 365.

If in case, the above strategy fails then the best way is to export the data of Office 365 in a local system and then import it into Outlook.

In order to know how to export Office 365 mailbox to PST locally, you can use the automated utility such as Office 365 Export tool from SysTools.

The following are some of the prominent features of ‘Office 365 Export’ Tool:

• Extracts the data from Office 365 and converts them into PST/EML/MSG file type
• Data including mails, contacts, calendars, and tasks are extracted and stored locally
• ‘Date & Category Filter’ helps to extract the specific data as per date range and from the selected folders
• Restores the read/unread mails after the export process
• Naming Convention is ensured for the emails being exported into EML/MSG
• Allows exporting the multiple users account by using Admin Impersonation in one go
• Creates export report in CSV format after the process is completed
• Office Export is compatible on all the versions of Office 365 licenses
• Works well on all the latest versions of Windows Operating System including Windows 10

Benefits of Choosing Automated Tool

• The tool requires the admin or user account credentials along with few simple steps to initiate the export process
• Office 365 Export can be installed using any browser like Google Chrome, Internet Explorer, Mozilla Firefox etc. Hence, there is no constraint on using any of the web browser. 
• The data of Office 365 can be extracted and stored in PST/MSG/EML which can used in the respective supporting applications
• The subsequent exported file is completely error free
• There is no loss of data during the export process
• The email properties remain intact without affecting the data integrity

In the above lines, the automated tool has been discussed to export the data locally.

Now, the next step is to import the exported Office 365 data into Outlook account.

The following are the steps to import the exported data into Outlook account:

1. It is recommended to disable Cached Exchange Mode before initiating an import.

2. Go to the ‘File’ Tab, click on ‘Open & Export’ and then click on ‘Import/Export’.

3. Once done, then click on ‘Import from another program or file’ and then click on ‘Next’.

4. Now, select the file type to import from as ‘Outlook Data File (.PST)’.

5. Browse for the folder or file from where to want to import data and then click on ‘Next’.

6. Choose the folder where you want to import the data to.

7. Click on ‘Finish’ button.

8. Once the import process is complete, then enable ‘Cached Exchange Mode’ again.

It is to note that Cached Exchange Mode keeps a copy of your activity. It is better to disable it in order to prevent the slowdown of internet connectivity.

In the above lines, you are able to successfully import the Office 365 data into your Outlook account. Such a method is helpful when all the practices get failed to sync Office 365 with the Outlook account.

Henceforth, in this blog, you have learned about the scenarios and the implication to fix the issue of ‘Office 365 not syncing with Outlook’. The effort has been made manually and if in case it fails, then the trusted automated tool ‘Office 365 Export’ and the import process using the Outlook account can be used to overcome the issue. Therefore, you may refer to the above methods and adopt the one that suits best to your requirements.