The reason why error 0x85002012 is referred to as a “bug” is because, in almost all cases, it is caused by an apparent bug in Windows 10 Mail that causes the application to not be able to sync with the user’s email account if the email account’s Inbox has more than 99 emails in it. The number of emails in the other folders of the email account does not matter, but if the account’s Inbox has over 99 emails in it, the sync process fails and the app displays error 0x85002012. The following are the two methods that you can use to get rid of error 0x85002012 and be able to successfully sync with your email account:
Method 1: Run an SFC Scan
To eliminate damaged or corrupted system files as the cause of error 0x85002012 and simply for the fun of it, you should run an SFC scan that locates and repairs damaged system files before you actually move onto the fix for this problem that has managed to work for the majority of the people who have suffered from it. To run an SFC scan, you can follow the steps here. (sfc /scannow)
Method 2: Reduce the number of emails in your email account’s Inbox
If running an SFC scan does not work for you, the one solution that is bound to work for you is reducing the number of emails in the Inbox of the email account that Windows 10 Mail fails to sync with. In order to do so, you will need to access your email account through a means other than Windows 10 Mail – an internet browser, for example. It doesn’t matter if you delete emails from your account’s Inbox or move them to a different folder, as long as you can reduce the number of emails in the Inbox to any number less than 99, Windows 10 Mail will be able to sync with the account and successfully serve you your entire email account to you.
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