We have two domain names in Microsoft 365 within one tenant, abc.comand xyz.com.We already have a Teams group named “info” with the email address info@abc.com for members A, B, and C. When we try to create a Teams group with the same name “info” on xyz.comfor members X, Y, and Z, we get the error “The email address is already being used.”
Online search result states: Although the abc.com domain name is different from xyz.com, they are all in the same tenant. You can’t have the same group name across all your domain names in the same tenant.
Simplest way around this is to initially create a group mailbox with a different alias e.g. infomation@abc.com. Then once created, go in and add the correct address as an alias, info@xyz.com and make it primary. Then you can remove the information@abc.com alias.
