Hilton and Marriott are both offering instant Silver status to Accenture employees, but anyone can sign-up for the offer. The Hilton offer is available to all current and new members, whereas the Marriott offer requires you to create a new account. Silver status is the bottom-tier elite status for both programs, and though the benefits may be marginal, it never hurts to have elite status when staying with these hotels.
The Marriott Silver status may take 48 hours to process, so the earlier you do it, the better. In addition to Silver status, Hilton offers you a fast-track to Gold status where 4 stays within the next 90 days gets you Gold status, which is easily the best mid-tier hotel status in the industry.
Bottom-tier elite status has been losing its luster over the years, but it's still better than nothing. And free status is always nice.