Exchange Offline Contacts Sync Issues & Avoid the risk of OST File Corruption

Microsoft Outlook allows you to maintain offline folders and data which is handy when Exchange Server is out of service.

These offline email items are stored as .ost file and it gets stored on your computer. Whenever Exchange Server comes back to online, the OST file automatically syncs all edited email items to maintain consistency of data on both Exchange server and OST file.

Though Microsoft has provided with high technology with Exchange server and OST files, these email technologies are not without any errors as the different versions of Outlook shows different sets of issues and errors after encountering with unexpected software or hardware issues. In the recent versions of Outlook, users are encountering the synchronization issue of Offline Address Book when they are trying to access emails through Office 365 mailbox. In fact, there is always a common error that you might come across with an error ‘Microsoft Exchange Server’ reported error (0x8004010F): ‘The operation failed. An object could not be found.’

This error stops the accessibility to OST email items and puts a showstopper in synchronization process.

Plan of action to Resolve Offline Address Book OST file Synchronization Issue

Steps to resolve Offline Address Book sync issue is to verify the Global Address List (GAL). Login to the OWA account and check if the GAL is continuously updated as required. If the GAL is not working properly, then Offline Address Book wouldn’t be synchronized.

You can download the Offline Address Books (OAB) by following the below steps:
Click the Send / Receive tab, and then click Send / Receive Groups. (In Outlook 2010 and 2013). Click the Download Address Book, the Offline Address Book dialog box is displayed.
Unmark Download changes since last Send/Receive. Click Full Details, and then click OK.

After downloading the OAB, ensure that the Cache Exchange Mode is enabled. To verify this, execute the below steps:
Click File – Account Settings – Account Settings. (In Outlook 2010 & 2013)
E-mail Settings window is displayed, select the Exchange account you wish, and then click Change. Select Use Cached Exchange Mode in the Microsoft Exchange Settings window.

Check the activeness of Background Intelligence Transfer Service (BITS) by using the below steps:

Click Start – Control Panel – Administrator Tools – Services.
Locate the Background Intelligence Transfer Service and make sure that the service status is Started. Reinstall the BITS service, if it is not starting after configuration.

After configuring these settings, login to the Office 365 user account and verify if the email items get reflected even when Exchange Server is offline.

However, for any issue with synchronization of Offline Address Books can have major impacts on the OST files. You should not rely on the above mentioned plans as things might go out of control which leads to corruption of OST file. Authentic recovery of OST email data in such situations couldn’t be managed by manual techniques. Recovering and repairing the corrupt or healthy OST email items from the start can only be recovered by a third party OST recovery and repair tool. As OST files couldn’t be accessed directly, hence the third party tool is capable to converting your OST files to PST file.

Recover your OST file to PST using EdbMails OST to PST Converter.

OST to PST converter tool is to repair and convert corrupted or healthy OST files from Exchange Server errors, hardware failures, or software issues. The software restores and save all OST data files to a PST files and also provides migration feature to Office 365 or to Live Exchange Server.

We request you try with Demo version. Download and install and verify the OST file data preview and export the OST file to PST or Migrate to Office 365 or to Live Exchange server directly.

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