If an Alliance Leader has been inactive for a period of 3 days, any Alliance member can initiate a Mutiny.
The Mutiny will then begin and the Alliance Leader will have 1 week to log back in, at which time the Mutiny will be cancelled as he is deemed no longer inactive. The mutiny is stored on the Alliance, so if the player starting the mutiny gets kicked or demoted, it still continues.
Eventually, a button will appear for any Alliance member to 'claim leadership'. When pressing the button they will become the new Alliance Leader, and the current leader will be demoted to the 'co-leader' rank.
If your alliance has issues with this we can do it manually however, the current Leader needs to be inactive for 14 or more days before we can fulfil your request.
After this time, if we are contacted about the Leader and they have not been online for the timescale mentioned above then we will be able to change the leader for you. Reach out to Support here to request a change of Leader.