How to use xibee Module in Existing Zigbee communication ?

what is the difference between the Zigbee and Xibee?

Can I use the Xibee Module in the Existing Zigbee communication?

I am not sure what an Xibee is, but a Digi XBee Zigbee module can be configured to talk to 3rd party Zigbee mesh networks. Just the the ZS, AP and AO options on the XBee. Then you can Join and communicate over other Zigbee profiles.