Not sure if you mean the verb ‘veiller’, as ‘veillez’ is the present 3rd person formal and plural imperative, as well as the present tense 3rd person formal and plural plural conjugation. 

There are many good online conjugators that you can check, and many of the free online dictionaries have ready access to full conjugation tables (with the advantage of word definitions and examples, of course) - 

Larousse, Robert and, as below, wordreference :

https://www.wordreference.com/conj/frverbs.aspx?v=veiller

Salut Perina,

Agree with Maarten   --  I looked at veiller also (to keep vigil  or stay awake) 

The second-person plural subjunctive is veilliez so that is the closest I can find to your query.

Bonne journée

Jim