I have looked after a few instances of Active Directory and basic user management involved multiple steps through GUI's clearly written at different times (you would go from a Windows 8 to Windows 95 to Windows XP styled windows, etc..)
I much prefer FreeIPA, if I wanted to modify a user account it was two button clicks. Adding a group and bulk applying was the work of moments. You can setup replicas and for a couple hundred users it uses no resources.
The only advantage I could see related to Exchange Integration as it makes it really easy to setup Sharepoint, Skype & Email.
Sharepoint never gets setup properly and you find people switching to alternatives like Confluence, Github/Gitlab Pages or Media Wiki. So that isn't an advantage.
Everybody loathes Skype and your asked to setup an alternative (Mattermost, Slack, Zoom, etc..). I am not sure how integrated Teams is.
Which really only leaves Email and I just can see the one off pain of setting up Dovecot as worth the ongoing usability pain of AD's user control.