Couple of our clients are complaning that their calendar entries from 3 months before are are missing in outlook 2010. The entries which are missing are the ones they have created themselves. Weird thing there are still some entries which my client said they were recurring entries. I have checked their outlook is not archiving emails. I checked this on two of the cleints pc they have same problem. They have SBS 2003 server. I checked calendar using outlook web access which also shows missing calendar entries. Is there anything I can do?