Official E-transcripts can be sent to gradtranscripts@uci.edu.
Hard copy official Transcripts will need to be sent directly to Graduate Division at:
Graduate Division - Transcripts
University of California, Irvine
120 Aldrich Hall
Irvine, CA 92697-3180
From the Graduate Division FAQ page:
I was admitted provisionally. When and where should I send my transcript and final degree confirmation?
Please send your official degree posted transcript (from US institutions) or official final transcript and official degree certificate (for institutions outside the US) AFTER you have been admitted and submitted a positive SIR (Statement of Intent to Register). If you have not completed your degree at the time you are admitted, submit your documents as soon as they become available to:
Graduate Division - Transcripts
University of California, Irvine
120 Aldrich Hall
Irvine, CA 92697-3180
Students earning a degree from a school in the U.S. may have their degree posted transcript sent directly from the Registrar of your school to gradtranscripts@uci.edu. Your program may also require a final transcript with degree confirmation, so please check with them to see if you need to send a second set of documents to them.