LIMITED POWER OF ATTORNEY


The undersigned hereby constitutes and appoints each of, Mikkel Svane,
Elena Gomez, John Geschke, Hasani Caraway, Andrew T. Hill, and Bradley C.
Weber, signing singly, and with full power of substitution, the
undersigned's true and lawful attorney-in-fact to:

(1) execute for and on behalf of the undersigned, in the undersigned's
capacity as an officer and/or director of Zendesk, Inc. (the ?Company?),
from time to time the following U.S. Securities and Exchange Commission
(?SEC?) forms: (i) Form ID, including any attached documents, to effect
the assignment of codes to the undersigned to be used in the transmission
of information to the SEC using the EDGAR System; (ii) Form 3, Initial
Statement of Beneficial Ownership of Securities, including any attached
documents;  (iii) Form 4, Statement of Changes in Beneficial Ownership of
Securities, including any attached documents; (iv) Form 5, Annual
Statement of Beneficial Ownership of Securities in accordance with Section
16(a) of the Securities Exchange Act of 1934, as amended, and the rules
thereunder, including any attached documents; (v) Schedule 13D and (vi)
amendments of each thereof, in accordance with the Securities Exchange Act
of 1934, as amended, and the rules thereunder, including any attached
documents;

(2) do and perform any and all acts for and on behalf of the undersigned
which may be necessary or desirable to complete and execute any such Form
3, 4 or 5, Schedule 13D or any amendment(s) thereto, and timely file such
form(s) with the SEC and any securities exchange, national association or
similar authority; and

(3) take any other action of any type whatsoever in connection with the
foregoing which, in the opinion of such attorney-in-fact, may be of
benefit to, in the best interest of, or legally required by, the
undersigned, it being understood that the documents executed by such
attorney-in-fact on behalf of the undersigned pursuant to this Power of
Attorney shall be in such form and shall contain such terms and conditions
as such attorney-in-fact may approve in such attorney-in-fact's
discretion.

The undersigned hereby grants to each such attorney-in-fact, acting
singly, full power and authority to do and perform any and every act and
thing whatsoever requisite, necessary or proper to be done in the exercise
of any of the rights and powers herein granted, as fully to all intents
and purposes as the undersigned might or could do if personally present,
with full power of substitution or revocation, hereby ratifying and
confirming all that such attorney-in-fact, or such attorney-in-fact's
substitute or substitutes, shall lawfully do or cause to be done by virtue
of this power of attorney and the rights and powers herein granted.  The
undersigned acknowledges that the foregoing attorneys-in-fact, in serving
in such capacity at the request of the undersigned, are not assuming, nor
is the Company assuming, any of the undersigned's responsibilities to
comply with Section 16 or Regulation 13D-G of the Securities Exchange Act
of 1934, as amended.  The undersigned hereby agrees to indemnify the
attorney in fact and the Company from and against any demand, damage,
loss, cost or expense arising from any false or misleading information
provided by the undersigned to the attorney-in fact.

This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file such forms with respect to the
undersigned's holdings of and transactions in securities issued by the
Company, unless earlier revoked by the undersigned in a signed writing
delivered to the foregoing attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of 17 June, 2016.

/s/ Adrian McDermott

Adrian McDermott