Hi everypne,
Using latest WindowsLiveMail on a Win7_64bit system. I have numerous
eMail addresses installed, mainly IMAP, but also an @live.at eMail
address.
In this  live eMail address i have numerous folders + subfolders;
as i understand, the @live addresses use a sync protocol of their own
that differs from IMAP (MS calls it DeltaSync).

This @live eMail address is all in all installed on 3 computers and
most of the time the syncing of the folders/subfolders works fine.

However, every month or so the following phenomenon happens in
WindowsLiveMail:

sending/receiving eMails works fine and *at first glance* the
subfolders of the @live address seem to be there, but they are all
muddled up:
some folder names are present but the SUBFOLDERS are gone (not showing
up).
Double-pressing F5 to resync everything does not change anything.

When using the webmailer to look into the @live address, all the
folders/subfolders are correctly there.

So my only workaround when this error happens:
1. remove the account in WLM
2. set database compression to 1, set "work offline", log out of
WindowsLive, close WLM to let the database compress properly, re-open
WLM.
3. Re-install the @live eMail account and wait until everything syncs;
the deltasync protocol does its work and all folders/subfolders
reappear.

However .......... not very convenient, does anyone know of a better
solution?

greetings from Vienna

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Noe: Removed full name for security reason.