Thank you for reaching out! Azure DevOps and its services are not supported in Microsoft Q&A because the Azure DevOps team and DevOps community are actively answering questions here:
https://developercommunity.visualstudio.com/spaces/21/index.html
Before you go, take a quick look at this documentation to see if it answers your question:
https://learn.microsoft.com/en-us/azure/devops/boards/sprints/set-capacity?view=azure-devops
Capacity takes into consideration the variation in work hours by team members as well as holidays, vacation days, and non-working days.
Because days off and time available for each team member can vary from sprint to sprint, you can set capacity for each sprint. The capacity tool helps you make sure your team isn't over or under committed for the sprint. Also, as you work day-to-day, you'll be able to see if your team is on track.