[bugaloohans]

My husband and I both have the z10. In the past month our calendars have been erased. Nothing is stored, nothing in our past appointments or future appointments. Nothing from our desktop calendars - nothing - they are just wiped...no reason - just gone!
We have lots of daily and weekly - future appointments stored - some 8 - 12 months out - this is not a bonus...any idea what the issue could be?

[tsac]

This is a known issue and there are some limited work arounds.
It may have to do with the calendar Sync method or a software conflict on your PC. You did not say how your doing the Sync. It is possible if your both using the same PC there is a security conflict.

Read this link from Blackberry .

KB33905-Calendar entries are not displayed or disappear from the BlackBerry smartphone