Outlook Error 0x80072f06: Causes and Solution

admin | November 15th, 2016 | Technology

Owing to its outstanding capabilities and features, MS Outlook has received a huge crowd of users. With the freedom to work in both online and offline mode users can easily, work with Outlook whenever they require to. When operated in online mode, Outlook creates a PST file. Further, in offline mode an OST file similar to PST file is created which is updated once Outlook is synced with Exchange server. While working with Outlook and during synchronization of OST file to Exchange server, certain issues may lead to a few errors. One such error is Error 0x80072f06.

Occurrence of Error 0x80072f06

Outlook accounts associated with different versions of Exchange server avail Offline Address Book to manage the contacts in Outlook. OAB is very much similar to GAL or Global Address List in Exchange server mailbox. The GAL contains information of user like names, email address, etc. which is accessed by Outlook.  However, with OAB the Outlook user does not need to connect with Exchange server whenever he is sending or receiving any mails or when user information is required. The OAB file needs to be synchronized regularly with GAL to keep it updated of user information.

When a user migrates from an existing version of Exchange Server to a different version, this error is likely to occur. When the migration is done users are unable to download the Offline Address Book aka OAB. In such cases, OAB is available on the server but it is not found by Outlook or Outlook fails to download the OAB.

Cause Of Outlook Error 0x80072f06

As discussed in the above section, the OAB need to be synchronized from time to time with GAL. However, when the synchronization fails to take place error 0x80072f06 is encountered. In addition, it is observed that this error is experienced in case of multiple Exchange server environments. Many large enterprises use multiple Exchange server connections to expand their connectivity with Outlook. In such an environment of multiple servers when the OAB file is updated with Exchange users, receive the error-

Error 0x80072F06: The security certificate on the server is not valid. Contact your Exchange Server administrator of ISP to install a valid certificate on the server.

This is because the name of the certificate used by Exchange server must match with the server name of the URL from which the user is trying to download the OAB file.

Solution For Outlook Error 0x80072f06

You can work round this error by deleting the existing OAB file and downloading a new OAB one. When the new file is synchronized with the server, there are chances that the error will not reoccur. Furthermore, it is advised to see to it that the name of the certificate must match to the server name of the client’s URL.

Alternate Method

If the above methods fail to resolve the error, it is advised to switch to a third party tool that will definitely solve the error. One such solution is OST Wizard. The tool efficiently works on error and recovers the file if any corruption is done to the OST file at the time of synchronization process. Some of the prominent features of the tool are:

  • Recovers the corrupted data files in exact form.
  • No exchange and Outlook connectivity is required
  • Preserves the data integrity after recovering the data.


Errors creates a hurdle in the working flow, similar is there in the case of Outlook. Many times, user faces an Outlook Error 0x80072f06 while working. In the above-discussion, the same error is described that makes easy for users to perform to remove the error and continue with the flow of work.

Product Page (Turgs OST Wizard): https://turgs.com/ost/