However, if your email server supports ONLY a POP3, auto account setup will create a POP3 account. More often than not, it’s caused by either a corrupted Outlook profile or a change in the data file’s location. And though an error solve Office 365 mailbox sync delays message might look worrying, you may be able to fix the problem.

Fixing 'Outlook Data File Cannot Be Accessed' Error on PC

That way, you can access previously downloaded or synchronized messages, as well as calendar information, contacts, and tasks even when you’re offline. In this step-by-step guide, you’ll find practical methods to resolve the error and recover your troubleshoot Outlook synchronizing folders error data, whether you’re dealing with a corrupted file or a disconnected profile. The error message indicates corruption in the Outlook data (PST) file. However, the error may also occur due to various other reasons.

• It can recover all the mailbox items from the corrupted file and save them to a new PST file, which you can import into your Outlook profile.
• Find solutions to common problems or get help from a support agent.
• Sometimes, data files get corrupted in a way that none of the methods above can help.
• You can use the Inbox Repair tool (SCANPST.EXE) to diagnose and repair errors in your Outlook data file.
• The Inbox Repair tool creates a backup file with the same name as the original, but with a .bak extension, and saves it in the same folder.
• Our Outlook Express file repair software is designed to help you repair your files and recover your data, so you don’t lose access to anything you need.
• If your email server supports both IMAP and POP3, auto account setup will create an IMAP account by default.

Stack Exchange Network

By default, the Outlook data file resides in your local user's \"Documents\" folder. So you'll want to make sure OneDrive is not syncing that folder. By default, the Outlook data file resides in your local user's "Documents" folder. In the Folder Pane, you might see a folder named Recovered Personal Folders that contains your default Outlook folders or a Lost and Found folder. Although the repair process might recreate some of the folders, they may be empty. The Lost and Found folder contains any folders and items recovered by the repair tool that Outlook can't place in their original structure.

What Our Users Say

During the syncing process, OneDrive locks the file, which prevents Outlook from accessing it, resulting in the "Outlook data file cannot be opened" error. You can try to repair Outlook data files to fix the error. This is a good solution if you think your data file might be corrupted. MS Outlook stores all the information related to your email account both online and in a local file on your computer.

Repair Outlook Data Files (.pst and .ost)

From single external hard drives, SSD’s, mobile devices to enterprise NAS, SAN, and RAID failures, we are ready to help recover from digital disasters, anywhere. When you want to replicate a copy on the cloud, manually copy the PST in the OneDrive folder. This will result in one copy in the folder in OneDrive being used for backup purposes, and another copy in your Outlook client that can be kept open by Outlook. Outlook 2013 and 2016, users of both have reported this issue.



Sometimes, data files get corrupted in a way that none of the methods above can help. This might happen due to a power failure or improper shutdown, hardware issues, or viruses and malware. This could happen if, for example, OneDrive backs up your Documents folder FixTechGuide email error solutions to the cloud and includes the Outlook Files folder where the file is located.