The issue occurred on a macOS device where nsurlsessiond consumed excessive data (75GB+) while Microsoft Office was installed. No active usage was involved. The issue stopped after uninstalling Office. To reproduce: Install Office, monitor nsurlsessiond via Activity Monitor for high data usage.
Excessive Data Consumption by nsurlsessiond on macOS When Microsoft Office is Installed
Thanks for your post and apologies about the delay.
You should check with the support resources provided by the 3rd party to get assistance with their software. They may have already identified the issue a fix.
Unless another developer in the forums has experience with the third-party and can provide assistance.
Albert Pascual Worldwide Developer Relations.