Exchange contact and calendar info not synchronized in Afaria 7 SP 4

I am facing issues with some devices enrolled in Afaria 7 SP4 environment with respect to Exchange information.

Email setting are working fine and emails are also being received on device but the exchange contact and calender information are not synchronized, it is getting fixed if we re-enroll the devices.

Has anyone faced such problem? Please help me out to find the root cause and fix this issue.

Regards

Rahul

Message was edited by: Michael Appleby