The "authentication timer inactivity server dynamic" command

[rantony]

The following command is used when configuring ISE on a Cisco Switch: "authentication timer inactivity server dynamic". The "authentication timer inactivity server" command is compatible with all IOS versions. However, the addition of the final key word "dynamic" is not supported on all IOS versions. When exactly was the complete "authentication timer inactivity server dynamic" command introduced? 

I previously asked this question in the ISE section. I am looking for the particular IOS version where this command was introduced. 

[pieterh]

authentication timer inactivity { seconds | server }

Hm..... Dynamic is not listed here -> partial answer,

the command itself see below

Command History

Release	Modification
12.2(33)SXI	This command was introduced.
15.2(2)T	This command was integrated into Cisco IOS Release 15.2(2)T.