Azure SSO App registration

 1. Registration App go to Azure AD for full feature

2. Enter name

3. Select registration app

4. Go to overview and URLs

5.Config Redirect URLs

6.Config branding

7. Make update code

8. Return to Enterprises applications for add access user and group

Prevent users create Office 365 group

 Prevent users create group (Office365 and Microsoft Teams)

1.Make Sure that install only AzureADPreview

    Get-InstalledModule -Name "AzureAD*"

    Uninstall-Module AzureAD

    Uninstall-Module AzureADPreview

2.Install Module

    Install-Module AzureADPreview

3.Import Module

    Import-Module AzureADPreview

4. Connect username and pwd

    Connect-AzureAD

5.Let check paramiter 

    (Get-AzureADDirectorySetting).Values

            GroupCreationAllowedGroupId = null

            EnableGroupCreation = True

6.Create Security Group on Office365

    Get-AzureADGroup -SearchString "Client_Adm"

7.run_Script

$Setting = Get-AzureADDirectorySetting -Id (Get-AzureADDirectorySetting | where -Property DisplayName -Value "Group.Unified" -EQ).id

$Setting["EnableGroupCreation"] = $False

$Setting["GroupCreationAllowedGroupId"] = (Get-AzureADGroup -SearchString "Client_Adm").objectid

Set-AzureADDirectorySetting -Id (Get-AzureADDirectorySetting | where -Property DisplayName -Value "Group.Unified" -EQ).id -DirectorySetting $Setting

8.Let check

    (Get-AzureADDirectorySetting).Values

=Revert=

https://blog.djurasovic.com/step-by-steps-instruction-how-to-disable-creation-of-office-365-groups/