Show Cause Notice - Is this a type of misconduct to reject the confirmation letter if you are not agreeing some terms in it?

Dear All,
Recently after 6 months probation i am confirmed as an employe in an organization.After that i got a confirmation letter from HR in that it is stated
that my notice period would be 2 months.But i am not comfortable for 2 months notice period so i clearly mentioned it to HR.
After some days later i got a "Show Cause Letter" from HR (Please Find The Attachment Which Contains Some Part Of Actual Letter)
for showing misconduct.
My question is that
Is this a type of misconduct to reject the confirmation letter if you are not agreeing some terms in it?
Also please help me to give a reply to this show cause notice as i am new to this subject.
Appreciate Your Help.
Thank You

How do i reply to a show cause notice for dismissal.

Any type of letters/communications issued .by the management should be
acknowledged by the employee concerned. Acts such as "Rejection/Refusal" will not
have a place there. If you have any objection in the communication, you are at liberty to
go to your HOD/HR department and communicate/discuss the same separately. But written communication from management shall be acknowledged, forthwith.

Refusal to do so, tantamount to gross indiscipline and act of refusal is a misconduct
and management can initiate disciplinary action against you.