If you utilize the UserPrincipalName parameter, you needn't use the AzureADAuthorizationEndpointUri parameter for MFA or federated end users in environments that Typically have to have it (UserPrincipalName or AzureADAuthorizationEndpointUri is required; OK to employ the two). Sending from An additional mailbox by using permissions is counted to the delegate with https://keikob198iug2.wikinarration.com/user