Provision new Teams user accounts without SfB Hybrid account migration

Hi,

if you say Teams with PSTN calling you mean Teams with a calling Plan from Microsoft?
You don't need to keep an SfB server for managing Teams if you are pure Online for SfB/Teams. To decommission the SfB server environment here is a guide that you can use for your planning.

https://blogs.technet.microsoft.com/fasttracktips/2017/06/27/decommissioning-skypelync-on-premises/

At the end, you should ensure that the SfB online attribute InterpretedUserType is DirSyncSfBUser for your csonlineusers

https://msunified.net/2019/07/11/my-post-migration-from-skype-to-teams-toolbox/

You can achieve this by disabling all SFB user accounts and ensure that all msRTC attributes are blank. You don't need them for a Teams deployment without SfB Server.

Doing an unprep of the forest and domain is also an option so you don’t have any OnPrem msRTC attributes.
A new user will be added to the OnPrem AD, then synced and then enabled for teams by adding a license.

Hope this helps

Regards,

Paul