Search: the office dream team, the office nana, michael scott nana
Why: She looks familiar. I think she might be the little old lady in "Dumb & Dumber" who stole all of Lloyd's stuff.
Answer: I could not find the answer anywhere online. Every website on the Internet is completely useless. I had to watch the whole episode again just to see the credits. Harumph.
Anyway, I was right. The actress is Connie Sawyer.
Source: my own blood, sweat, tears, and DVR
The More You Know: Connie Sawyer is 96 years old.