External User

Hi PedramBK,

1. You can invite Guest User from Azure AD - Users - Guest Users - New Guest User - Fill the fields and you should be all set.

Note: If you can’t add, check the setting Under Azure AD - External Identities - External Collaboration Setting - Collaboration Restriction.

I strongly recommend force MFA on Guest users in your tenant using Conditional Access before sending the invitation.

2. I would register your tenant with Apple Business Manager (ABM) so you can use superviced model on you iPhones with Intune MDM control (Company Portal).

Hope this helps!

Moe

Some links that may help:

https://docs.microsoft.com/en-us/mem/intune/remote-actions/device-supervised-mode

https://docs.microsoft.com/en-us/microsoft-365/solutions/microsoft-365-guest-settings?view=o365-worldwide