@Thibaut ,
You can check the tutorial https://learn.microsoft.com/en-us/azure/active-directory/saas-apps/slack-provisioning-tutorial which will help you automatically provision and de-provision user accounts from Azure AD to Slack . The article has all the details . You require to be on the Slack Plus plan or above enabled , a user account in Azure AD with permission to configure provisioning (for example, Application Administrator, Cloud Application administrator, Application Owner, or Global Administrator) and Team admin level Slack account .
Every capability may not be supported however you should be able to automate the user creation for sure. The following is the capability supported.
- Create users in Slack
- Remove users in Slack when they do not require access anymore
- Keep user attributes synchronized between Azure AD and Slack
- Provision groups and group memberships in Slack
- Single sign-on to Slack (recommended)
Hope this helps. In case you have any further query , do let us know and we will be happy to help . The article has all the information and I strongly suggest you to follow the same. In case the information provided helped , please do accept the post as answer which will help other members of the community with similar issues.
Thank you,