OST Error:Synchronization with the Offline folder file could not be completed

Outlook offline folder required proper synchronization with Microsoft Exchange Server to convert into PST file. Any error while the process might leave the file orphaned and you might need to Convert OST to Outlook usable PST file using third-party tools.

You might receive below error message when trying to synchronize your Outlook offline folder:

“Synchronization with the Offline folder file could not be completed. The attempt to logon to the Microsoft Exchange Server computer has failed.”

The error suggests that Outlook offline folder could not make secure connection with the Exchange Server. Such issues leave the OST file orphaned and of no use with Microsoft Outlook.

Solution

The two possible solutions to this problem are:

1-You can create a new user profile and OST file
2-To retrieve data from unusable OST file, you can convert it to Outlook usable PST file by using third-party tools

To recreate the Outlook user profile, follow these steps:

1-To start with creating new user profile, you need to first exit the Outlook application
2-Launch Control Panel from Settings option of Start menu in Windows
3-Next, you need to double-click the Mail and Fax icon
4-After this, you can click Show Profiles and click to Add a profile
5-The Setup will recommend you steps to create a new user profile. You can follow them to create the profile with desired services

To recreate the OST file, follow these steps:

1-You should start Outlook with the newly created profile
2-Click Services option listed in the Tools menu
3-After this, you need to click Microsoft Exchange Server service and select to choose its Properties option
4-Click 'Offline Folder File Settings' option on its Advanced tab
5-Specify the location and name of this new OST file and click Yes and then OK to save the settings
6-Restart Outlook

To Convert OST to PST file, you need to use third-party tools that could safely perform OST file conversion and maintain all the data intact. Convert OST software use comprehensive mechanisms and provide a suitable way to convert an unusable OST file to usable PST file through graphically rich user interface.

Stellar Phoenix Mailbox Exchange Desktop is an advanced and safe utility competent to Convert OST to PST. It supports converting OST files created with Outlook 2007, 2003, 2002, 2000, 98 and 97. It is a reliable tool to safely convert an unusable .ost file to a usable .pst file. It supports Exchange Server 5, 5.5, 2000 and 2003.