we have often a problem that the snyced data on the mobile devices does not match the displayed data in the GroupWise Mailbox. (Every version of GMS & GW & SLES)

A way, to get both in sync again, is to resync the device via the "resync device" button in gms.
But the problem with this button is, every post configuration after a mailbox is configured on our iphones (like calendar color, displayed calendars, standard calendar, standard mail accounts and so on) are resetted too.
So if I do a "resync device" on a users device, I have always go to the user to help him configuring his device like it was before the resync.

Are there any other ways to get a clean resync between device and groupwise without "loosing" the post made configurations ?