If he leaves the adjustment application will be deemed abandoned. If he wants to travel he should file for advance parole, form I-131.
The above is intended only as general information, and does not constitute legal advice. You must speak with an attorney to discuss your individual case.
He does not need to leave. In fact if he does leave his 485 will be abandoned as well as the 1070.00 you paid toward that end. Whether there are intent issues is another matter.
The answer provided is general in nature and should not be construed as legal advice as not all facts are know by the attorney, nor does the answering of this question create an attorney client relationship.
He can't leave now. If he does, without the filing for advance parole, his adjustment application will be deemed abandoned.
Irene Vaisman, Esq. 11 Broadway, Suite 615 New York, NY 10004 (646) 253-0516 This is not legal advice and a client attorney relationship is not created. For a free consultation call (646) 253-0516.