I try to think outside the box in terms of where to shop for clothes for work. There are the professional attire go-tos that I can always count on for work-appropriate items (Theory, J. Crew, Banana, Ann Taylor, etc.), but if I only dress in clothes from those stores, I feel like I either look like a cookie cutter "corporate woman" or a walking advertisement. Neither look is a very personal expression of style.
Instead of building an entire work wardrobe from these standard "work" stores, I try to mix in pieces from more unique sources (at least as far as work clothes go). I found this dress when browsing the relatively new clothing line of one of my favorite bloggers, Rachel Parcel (creator of the blog Pink Peonies). While she does not design for work per se, she designs feminine, timeless, conservative pieces at a reasonable price-point, so she occasionally has items that work for the office. Other stores that often have updated items that work for the workplace are Club Monaco and & Other Stories. While you probably won't be able to fill your entire work wardrobe at these stores, they often have more interesting and unique items that can help personalize your work look a bit more than the more traditional "professional" stores can.
As far as this particular dress goes, I love that it is a classic pencil silhouette but features the very on-trend (and very feminine!) belle sleeves. They add a little structural style, but aren't so frilly or fussy as to make the look too wedding-guest-y for the office (also a good reason to avoid all-over lace). I also love the color. It is a pale shade of pink that, while very feminine, reads more sophisticated and mature than some brighter shades would. While I certainly don't shy away from femininity at the office, I do try to avoid coming across as cutesy or girly. When wearing more trendy silhouettes to the office, I think it's best to stay away from bright colors (save those for the sheath dresses!).