Azure AD B2B & B2C accounts provision to MS Exchange Address Book

Below setting in Azure AD user entry will make the external account visible in Outlook Address book -

1. Create Azure AD guest account using Graph API invitation URL
2. Update the user entry by setting "ShowInAddressList" attribute to "true" using Graph User API
3. Check the email address in Outlook Address Book

Note - This above configuration worked in beta version of graph API.

Thanks

Siva Pokuri.