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What to do if Outlook Error 0X80072F06 Occurs?

Generally, Microsoft users face “Outlook Error code 0X80072F06”. This post is for those users who encounter this error and are not able to fix it. Here, you will get to know all the methods to troubleshoot it. Don’t miss any step, read this post carefully till the end, and resolve this issue.

What is Outlook Error Code 0x80072f06 and What are the reasons behind this error?

The unknown Error 0x80072f06 in Outlook is simply an OST file error. It occurs when Outlook is not compatible with the exchange server. Outlook generates a PST file when we work in online mode. Similarly in offline mode, an OST file (like PST) is created.

Whenever the synchronization (OAB and GAL) fails then, Error 0x80072f06 occurs. Also, there are other reasons as well that are discussed below:


  • When there is improper updating of .oab file.
  • Corrupt Windows file system.
  • MS Outlook improper installation.
  • Incomplete installation is there.
  • An incomplete uninstallation is there.
  • Improper hardware deletion or removal.

Causes of OUTLOOK ERROR 0X80072F06

Users become unable to open the Offline Address Book which is also called the OAB(Outlook Address Book) folder during this error. The OAB folder includes all of the information that Outlook accesses, such as names, email addresses, etc. Using OAB, you don’t need to connect with the Exchange server every time to send or receive emails.

Methods to Fix Outlook Error Code 0x80072f06

There are three ways to fix this issue that is given below:

Method 1: System Restore

System restore will help you to restore the system to the previous point. It helps in resolving the error, so follow the steps below:

  1. Initially, sign in as an administrator on your computer.
  2. Hit the Start button>>choose All Programs>>Accessories>>System Tools>>hit on “System Restore”.
  3. Under the System Restore option, pick the “Restore my system to earlier point” option.
  4. Hit Next.
  5. Now, from the “On the list” Option, select the most recent system restore point.
  6. Press restore point list>> Next.
  7. A confirmation window will open, tap on Next option.
  8. At last, restart the system after the restoration process.

Method 2: Remove Existing .oab Files

There are chances that error is taking place due to improper synchronization between OAB file and exchange server. So, it is necessary to delete the existing .oab file. By removing the existing OAB file and downloading the new OAB file from Exchange Server will help you the most in this scenario. After that, sync the newly created OAB file with Exchange Server so that you will not face the error.

Follow the below steps:

Steps to Update OAB Files

In Outlook 2007 and earlier version, go to Tools >> Send/Receive >> Download Address Book.

Then visit Send/ Receive tab >> Send/ Receive Groups >> Download Address Book in Outlook 2010, 2013, 2016, 2019 and Office 365 Outlook.

Steps to delete or Rename OAB Files

To get a fresh OAB file copy, rename the OAB files. For this, type the name with the .old extension. Now, follow the given steps below:

  1. First, search the location of OAB files.
  2. The present system path for Windows Vista, Windows 7, Windows 8, and Windows 10 are given below:

C:\Users\%username%\AppData\Local\Microsoft\Outlook(The folder Offline Address Book contains multiple subfolders named after the GUIDs account. If you have a lot of Exchange, configured accounts, a separate folder can be found for each account. A simple way of renaming the Offline Address Book Folder is by adding the extension to.old after the name.)

3. Now, hit on the Update Folder tab to Update the folder.

Important: You might have to rename the individual OAB files for Outlook 2007 or earlier versions. There are 6 OAB files available that you may find are given below:

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

Method 3: Using an Alternative Method

This unknown error 0X80072F06 mostly occurs due to corruption in the OST file. You can use a direct way to repair damaged OST files, i.e. OST File Recovery utility. You can save your time and your manual efforts by using this method. This tool allows repairing all the data, including emails, contacts, journals, tasks, etc. and creates a new healthy OST file. It is recommended to use this method first to get the OST file repaired that automatically resolves the error.

Final Verdict

The most common reason for the Outlook error code 0x80072F06 is the OST file. Here, we discussed all its reasons and causes. Then all the methods to fix this issue have been mentioned one by one. We hope that you found this article helpful and it suits your needs.

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