We have an admin problem when it comes to maintaining the Directory of users in Lifesize. New users are added as they connect the first time but there are no way to automatically delete them when they leave the company.
We use the Single Sign On solution connected to Microsoft Azure and there is a special SCIM API that can be used to sync Azure AD information to products that support this.
We use this for Slack for example and it helps us sync several user information and the biggest winning - it adds and deletes accounts!
The app in Azure AD needs to support automatic provisioning and SCIM 2.0 for this to work.