Bryant also cautioned against a disruption in cross-border investment, as her company helps bring in investment from around the world, especially China.
It was unclear how the administration could implement the ban on WeChat in mid-September. It could order Apple Inc and Alphabet Inc's Google to remove WeChat from their app store, or order the apps to stop offering access or updates to U.S. users.
More users in the United States downloaded chat app WeChat and another Tencent-owned chat app, QQ, after President Donald Trump threatened to ban WeChat, according to Sensor Tower data on Thursday.
Other participants in the call included Procter & Gamble Co, Intel Corp, MetLife Inc, Goldman Sachs Group Inc, Morgan Stanley, United Parcel Service Inc, Merck & Co Inc and Cargill Inc.