I have Office 365 Home Premium on my Windows 7 Pro PC and I have a Windows 8 Phone.

My desktop Outlook Account uses Exchange ActiveSync

Some emails that show up in Outlook.com, on my Windows Phone 8 (server is bay-m.hotmail.com), on my iPAD (set up as MAPI) do not show up on my desktop Outlook.

It seems to me that this happens occasionally and only with threaded emails. My desktop Outlook does not thread emails (neither does the iPAD for that matter) whereas Outllok.com and Windows Phone 8 do.

So far as I can tell Contacts and Calendars all sync properly between desktop Outlook, Outlook.com and Windows Phone 8 (iPAD syncs properly with entries from the Windows world but calendar and contacts entered in iPAD do not show up in desktop Outlook, Outlook.com or Windows Phone 8) .

It is only desktop Outlook that is on occasion missing emails. This is a significant problem for me as desktop Outlook is where I organize my email and where I almost always reply to emails.

Two other things:

1. I've also experienced dragging and dropping an email in desktop Outlook from a folder to the Inbox and the email has disappeared from desktop Outlook altogether.

2. For emails that do not show up in desktop Outlook - I go to Outlook.com and move such an email from the Inbox to a folder --that email (which was not in my desktop Outlook Inbox) will then show up in that folder in desktop Outlook.

Any help with or explanation of this problem would be appreciated.

Andrew Morris