
While an over-simplification, presently call queue and attendant capabilities in Teams lack some of the features available in Skype for Business (which also leveraged some capabilities of Exchange Unified Messaging). Similarly, automated attendant/IVR capabilities in Teams are based on new code.

These, however, are one-to-many rather than interactive meetings, and only allow attendees to join via Web browsers. This is not to be confused with broadcast meetings, now called Live Events in Teams, which enables the hosting of meetings for up to 10,000 attendees. While you could set up a dedicated Skype for Business pool to host interactive meetings with up 1,000 users, meeting size in Teams is currently limited to 250 users. Meetings - While Teams and Skype for Business meetings are similar, they have important differences.(There is some indication that this will improve with future updates.) Teams guest access at present is cumbersome to manage and creates a disjointed user experience. In several cases, federation between customers and suppliers was specifically noted as significantly improving the business relationship and overall customer service. Federation with external organizations - the OCS/Lync/Skype for Business federation model was very easy to implement and manage, and provided a tremendous improvement in the ability to communicate and hold meetings with users from organizations also using Skype for Business.Contact center and other third-party integration - organizations that have deployed contact center applications integrated with Skype for Business or have invested in third-party reporting or management tools should be aware that few if any of the existing tools work with Teams.Teams multi-geo capabilities don’t currently provide the same level of control.

Data residency - larger organizations may have created multiple Skype for Business pools located in different countries to address regulatory requirements related to where call detail records, IM conversations, uploaded content, and meeting recordings are stored.
