Setting up IT for consultants is always a challenge and in the past often the only workable solution was to give them a domain account. Microsoft has done great work over the the past few years in supporting external users better and has now created a toolkit to address this challenge.

• https://www.microsoft.com/en-gb/microsoft-365/blog/2018/12/06/introducing-microsoft-365-freelance-toolkit-a-solution-to-launch-and-scale-your-freelance-workforce/