Contacts that are created, updated, deleted in the VContacts folder will be automatically updated in Vtiger CRM. On the other hand, the operations you perform on contact records assigned to you in Vtiger CRM are also updated in VContacts
folder. VContacts support two-way sync.
Changes done on your Exchange client are updated instantly. However, the changes done in Vtiger CRM might take some time to affect your Exchange client — it depends on the cron frequency set by your administrator.
To know more about Exchange Connector, click here