How to Fix Outlook “0X80072f06” Error?

Siddharth Rawat
Siddharth Rawat | Updated On - April 13, 2023 |

Read time 6 minutes

MS Outlook is a widely preferred and trusted email client that is being used today by almost every corporation and many individuals. Just like every email client, it has a few bugs which need to be fixed. These bugs lead to error codes; one such notorious error code is 0X80072f06. This error code is linked to the OST file. This happens when Outlook is unable to sync with the Exchange server. Outlook desktop client stores the user information such as names, email address, etc. in an Offline Address Book (OAB) which is similar to Global Address List (GAL) of Exchange server.

However, with Offline Address Book (OAB), Outlook users may face the error 0X80072f06 in some situations.

error 0X80072f06

This issue is more common among the users who have recently migrated to a different version of Exchange server. Due to this, users are unable to download the OAB. OAB is available on the server but is not found by Outlook.

Some of the prominent reasons behind this error are listed below:

  • Improper. oab updates
  • Issues with Exchange security certificates
  • Windows system file damages
  • Improper installation of the Outlook application

How to fix Outlook error 0X80072f06?

A possible workaround this error would be to delete the existing OAB file and to download a new one. Afterward, one should synchronize the new file with the server, hence fixing this issue.

Method 1: Perform System Restore

Restoring the system to an earlier time may help you resolve this error. To restore your system to the previous point, follow the step outlined below:

  1. Restart your computer and log in as Administrator.
  2. Next, go to Control Panel and select System and Security from all control panel items.
  3. Now, select System Protection from the left System Protection
  4. Now, a new wizard will appear on the screen; select System Restore under System Protection tab.System Restore
  5. Now follow the on-screen instructions to perform a system restore.

    It will take a few minutes for the Windows to restore the system. After resetting the system, check if the issue is resolved or not.

Method 2: Update or Delete the Existing OAB file

The error can occur due to improper synchronization of the OAB file with Exchange Server. So, deleting or updating the existing OAB file might solve our problem.

Update OAB

One can force an update (manually) the OAB as described in the steps mentioned below:

In Outlook 2007 and earlier: Go to Tools > Send/Receive > Download Address Book.
In Outlook 2010, 2013, 2016, 2019 and Office 365 Outlook: Go to Send/ Receive tab > Send/ Receive Groups > Download Address Book.

Download Address Book

One can also disable the option Download changes since last Send/Receive just to make sure that you get a completely fresh copy of the address book, but this could take a little longer.


Delete/Rename OAB

A second way to make sure that you get a fresh copy of the OAB file is by renaming the OAB files with .old extension at the end of the name.

  1. Go to the location where the OAB files are stored:OAB files location

    Note-For Windows Vista, Windows 7, Windows 8 and Windows 10

  2. The Offline Address Book folder contains several subfolders which are named after the Account GUIDs. In case you have multiple Exchange, accounts configured, you will find a separate folder for each account. The easiest way would be to simply rename the Offline Address Book Folder by appending/adding the extension behind the name to .old.Offline Address Book
  3. By opening the new OAB folder, one can see that it is empty. Update the folder by clicking on the Update Folder tab.Update Folder

Note: If you are using Outlook 2007 or earlier versions then you might have to rename the individual OAB files. There are six OBA files:

  • uanrdex.oab
  • ubrowse.oab
  • udetails.oab
  • updndex.oab
  • urdndex.oab
  • utmplsts.oab

After deleting these files, a manual update is triggered within the Outlook.

Method 3: Kernel OST to PST Converter

Kernel OST to PST Converter is a useful tool that solves many Outlook errors quickly. This OST to PST converter tool efficiently works on OST files and resolves any corruption that is making the data inaccessible. It has some great features, some of which includes-

  • Restore missing/deleted Exchange mailboxes from OST files
  • Recover large OST files
  • Resolve any corruption in the OST file
  • Save recovered OST file in different formats
  • Export OST mailboxes to Office 365 and various email clients

OST to PST converter

Kernel OST to PST Converter is highly efficient in fixing OST errors and resolving corruption issues.

Of the above three methods, the third method is the most reliable option as it ensures the recovery of Outlook data after the error 0X80072f06.


We have looked at the leading causes behind the error code 0X80072f06. In addition to this, we have also discussed two manual and one automated method to get past this issue. If the manual methods fail to solve this issue, then it is recommended to use a reliable third-party OST to PST converter tool such as Kernel OST to PST Converter.

Kernel for OST to PST