Microsoft introduced the first self-service purchase products in December 2019. Self-service purchase allows employees to purchase licenses for their business account at their own costs. New products are enabled by default.
There are currently 26 products.

From October, employees will also be able to order a license for Microsoft 365 Copilot at their own costs.
Microsoft has now added the option for self-service purchase in the Microsoft 365 Admin Center, as a supplement to PowerShell.
Billing administrators can control the provision of self-service purchase products in the M365 Admin Center > Settings > Org Settings > Services > Self-service trials and purchases. Depending on the product, there is an option to allow ordering of the trial version.
