After July 1, 2025, any sharing links generated with one-time passcodes (OTP) will stop working. Only links based on Entra ID B2B Collaboration will work. Users who lose access to content shared from SharePoint Online or OneDrive for Business will have to contact the original sharer to ask them to generate a new sharing link. Sounds like a recipe for confusion, which is what might happen.
Office 365 tenants using Entra ID external identities (like Entra ID B2B Collaboration guest accounts with apps like Teams) are moving to a monthly active users (MAU) billing model. The new model replaces the 1;5 ratio for Entra ID premium licenses used up to now. Microsoft allows tenants to have the first 50,000 unique external identities free of charge each month and bills for access thereafter. If you don’t already have an Azure subscription, you’ll need one to link to Entra ID. Linking the subscription should be an easy task, until it’s not…
In October 2021, Microsoft will enable the Azure AD email one-time passcode identity provider in tenants. SharePoint Online and OneDrive for Business will use the provider to control access for external people to its resources. The net effect is that Azure AD will create guest accounts for external sharing recipients. Even though guest accounts need to be managed, there’s lots of good reasons to use guest accounts, as we describe here.