In General terms, the mistake Outlook Data File cannot Be accessed implies that you are not,
at this point ready to get to the Outlook information document and you can't download and synchronize
your messages from the mail worker.
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1. Create a new Outlook profile
One of the ways to fix this error is to create a new Outlook profile. To do that, follow these steps:
Press Windows Key + X to open Win+X menu and choose Settings from the list.
In Settings click on Accounts > Email & accounts.
Click the Add an account button.
Add an account window will appear. Select E-mail Account option, enter your profile name and the required account information. Click Next.
Click Finish and your account will be created.
This process is automatic and it will create an IMAP account by default if the email server supports it. If you want, you can manually configure your email account, but before you can do that you need to locate your Outlook data file.
To do that, follow these steps:
Open Control Panel and click on User accounts > Mail.
When the Mail Setup window opens, click on Show Profiles button.
Select your current Outlook profile and click on Properties.
Click on the Data Files button.
The Account Settings window will now appear. Go to the Data Files tab. You should see the name and the location of the data file. Remember the location of the data file because you’ll need it for later steps.
To configure your email account manually, do the following:
Go to Control Panel and select User accounts > Mail.
Click on the Add button.
Enter the profile name and click OK.
In Add New Account window select Manually configure server settings or additional server types and click Next.
In Choose service dialog box select Internet E-mail and click Next.
Enter your account details in the Internet E-mail Settings window.
In Deliver new messages to section select Existing Outlook Data File, click Browse and locate your data file.
Click Next and your new Outlook profile should be successfully created.
More info: Email Migration Service
Regards,
Bruce