If license server is down, how does licensing work in the grace period?

Ans : Almost every who is supporting Citrix XenApp know that the moment license server goes down Citrix XenApp server goes to grace period for 30 days giving administrator the opportunity to recover the License server or build a new one.
But when asked about how exactly XenApp server holds the license information the question mark appears on the admin face luckily i was one of them but i did some digging on google and Citrix XenApp server registries and found the answer.

How licensing work in the grace period?
Initially i thought it is LHC which hold that information but every XenApp server cache License information in .ini file and the exact name of the file is MPS-WSXICA_MPS-WSXICA.ini which is saved at – C:\Program Files (x86)\Citrix\system32\cache

MPS-WSXICA_MPS-WSXICA.ini can be opened in notepad and if you have ever opened the LIC file in notepad you will be able to find the similarity. It looks like below –

This is finally gets updated automatically whenever you add any new license or make any changes to the License information. Please correct if am wrong if you server is down IMA pick the cache information with the help of below key