Ajay Joshiaj4u.hashnode.dev·Apr 27, 2023Guest users can't sign-in on Office.comWe created Guest accounts in Microsoft 365 and converted them to Members and changed their UPNs to the custom domain removing the #EXT# portion. Now, their UPNs are exactly like their personal email just that the domain is replaced with the tenant's ...282 readsMicrosoft365
