0x80040600 unknown error in Outlook 2013

Question

I HAVE REVIEWED OTHER QUESTIONS AND ADVICE ABOUT THIS ERROR. 
We are seeing a send/receive error in Outlook 2013, details are "Unknown error 0x80040600".  The problem is preventing send and receive of email to certain accounts, while permitting it to other accounts.
Virtually all questions and all advice found so far relates to earlier versions of Outlook, and the advice for dealing with the error cannot be followed here.  For example, the SCANPST.EXE program does not appear to be on the affected system,
so we can't repair the PST file as advised.  If a new PST file is created and made default, we cannot import messages from the old file as advised... Outlook will appear to be working for hours on updating it when we mount it and try to
open it, but will not display any items in it.
Yesterday, it did this on one of about ten email accounts managed by this Outlook client, the others continued to send/receive just fine.  We eventually restored a backup of the PST file and lost a couple of days of email, but everything worked
fine again.  Minutes ago, Outlook began reporting the same error with a different account.
Help please!  Thanks for any advice or ideas.

Answer 1

First of all, there are three reasons that may cause your problem, as follows:
1. Your Outlook PST file is damaged or corrupt.
2. Your Outlook profile is corrupt.
3. Your Outlook installation or configuration is incorrect.
To determine the accurate reason, you can do as follows:
Copy your PST file to another computer with Outlook installed, then start Outlook, then "File" -> "Open" -> "Outlook Data File", to open the PST file.
If the PST file cannot be opened, or there are some error messages when opening the file, then your PST file is corrupt and you need to go to (SOLUTION A),
otherwise, if the PST file can be opened without any problems, then your PST file should be healthy and the reason is 2 or 3, you need to go to (SOLUTION B).
(SOLUTION A): There are a lot of online resources discussing about how to recovering corrupt or damaged PST files.
First, the Microsoft offical tool scanpst, also called Inbox Repair Tool, can repair the PST file, you can refer the following articles:
http://office.microsoft.com/en-001/outlook-help/repair-outlook-data-files-pst-and-ost-HA010075831.aspx
http://support.microsoft.com/kb/272227
https://support.microsoft.com/kb/287497
If scanpst fails, then you can use third-party Outlook recovery tools such as
DataNumen Outlook Repair . It provides a free trial so you can try first to see if it works before purchase it.
(SOLUTION B) In such a case, you can create a new profile on your original computer, and associate the PST file with that new profile, and then remove the old profile and set the new profile as the default one, then restart your Outlook to see if that works.
If it still does not work, then your Outlook installation is incorrect and you may need to reinstall Outlook or even Office suite.
Good luck!