Here is the full e-mail text from the U.S. Embassy in Tel Aviv:
In anticipation of increased interest in the E1 and E2 visas in Israel, the E Visa Unit of the U.S. Embassy of Tel Aviv would like to inform you of a change to our procedures. These changes apply to certain E1 and E2 visa applicants only.
To date, all E1 and E2 visa applicants have pre-submitted documents and scheduled specific appointments, usually on Tuesday afternoons. You have accompanied certain of the applicants during their interviews. In the future, we will be dividing E visa applicants into two groups. The first group, applicants for companies not yet registered for E1 or E2 visas, will be handled in the same manner as before. The second group, applicants for companies which are already registered for E1 or E2 visas, will be handled differently.
Starting February 23, 2015, applicants from this second group will be able to schedule their appointment during our regular non-immigrant visa hours, from 7:45 to 13:10 on most days, Monday through Friday. The applicants will be expected to arrive with proper documentation as always. Another important change is that we will no longer permit legal advocates/company representatives to accompany these applicants to their interviews. This process change helps the U.S. Embassy Tel Aviv align with many consular sections throughout the world.
Thank you in advance for your cooperation with this change.
E1/E2 Visa Unit
Embassy of the United States of America
71 Hayarkon Street
Tel Aviv 6343229