Hi Siva,
Each CUWL standard license supports multiple devices and Jabber IM and Presence features, you can check the following for details
https://www.cisco.com/c/dam/en/us/products/collateral/unified-communications/unified-communications-licensing/C45_523902_11_9_licensing_aag_v5a_1.pdf
You can monitor the license usage via the ELM/PLM GUI.
HTH
Manish