Using Office 365 will increase your organisation’s Internet traffic, so it is important to evaluate and assess the network impact of the various services. To help with this, Microsoft have some capacity planning tools available.
These tools include:
- The OneDrive for Business Client Network Bandwidth Calculator. Link
- The Exchange Client Network Bandwidth Calculator. Link
- The Lync 2010 and 2013 Bandwidth Calculator. Link
More details about the planning can be found here.