Re-enable bulk invite from Azure Portal (B2B guests
The bulk invite (preview) functionality to invite multiple B2B guests was available on Azure Portal and was working fine. It has been disabled since 22nd Dec with no current deadline/timeline to re-enable it.
When I checked with Microsoft Product team they asked me to raise this as an idea here and that they will re-enable if there was enough community support.
Refer this for the functionality that I am referring to https://docs.microsoft.com/en-us/azure/active-directory/b2b/tutorial-bulk-invite