Hi Meenakshi,
Can I ask exactly what the need is? integrate the Outlook calendar with what? Tasks that are assigned to a user? for time entries? Can you be more specific?
we have done a few integrations with Exchange around assigned tasks, timesheet entries as well as some approvals, but the integration points are endless.
If you let me know what your business has in mind, i can share some of the issues we have encountered.
cheers,
Federico