One user reported to me that after the installing the latest Update for Windows 10 v1607 when using Outlook, he received the following error:

Task reported error 0x8004102A Error with Send/Receive. There was an error synchronizing your folder hierarchy. Error 80041004.

If you receive this error, I suggest you do the following:

1] Check if your email account settings have changed. If so enter the right credentials and other details.

2] See if you can manually synchronize Outlook with Outlook web app.

3] Open Outlook Options > Advanced and check the Send and receive settings.

3] See KB842284 and KB2231628 for more suggestions.