Cannot see a folder in Archive Explorer

Dear all,

We have recently imported several PSTs for a customer into EV [10.0.3]. She is complaining that she cannot see the folder into which we imported the items. This folder is called "PST Archives".

When I gave myself R/O access to her archive, I *could* see the folder, so assumed it was something on her computer causing the problem. To troubleshoot, I've done the following, in no particular order:

*Upgrade EV Client to 10.0.3.

*Run ResetEVClient.exe.

*Separately emptied IE temporary internet files folder.

*Hif refresh from the context menu in Archive Explorer.

*Rebuilt indexes.

*Used OWA.

*Used a different computer.

She can see every folder except this one.

What else can I do to try to fix this?

Thanks

Richard