The below command does not work because when entered I am prompted with a follow-up question of what the user's external email address should be (ExternalEmailAddress). If I enter bob@domain.com it works for the first result, but the rest fail because bob@domain.com is already used. Get-User | Enable-MailUser How do I get this command to include the ExternalEmailAddress for each user, but instead of a static (external) list, I want it to just assume the name should be the current SamAccountName@domain.com? Other provisioning programs do this with ease... and it DOES sound easy! So if get-user returns bob, sally and joe, I want this command to turn them into the MailUsers: bob@domain.com sally@domain.com joe@domain.com Mike Crowley A+, Network+, Security+, MCT, MCSE, MCTS, MCITP: Enterprise Administrator / Messaging Administrator

Try this: Get-User |foreach($_.samaccountname) {$email = $_.Samaccountname +"@domain.com"; Enable-MailUser -Identity $_ -ExternalEmailAddress $email -WhatIf} Note the -whatif - I think you will find that it plansto do way more than you want.Karl

For turn user to mail user in bulk, please see this thread

thanks for the help Karl and James. I will test this later in the week and report back! Mike Crowley A+, Network+, Security+, MCT, MCSE, MCTS, MCITP: Enterprise Administrator / Messaging Administrator

works as expected Thanks Karl!!! James-Luo thanks as well. Instead of a CSV I pointed the above script at an OU. For this project I'd like to keep it all in the pipeline, but i'll definitely save your csv method for later reference! Mike Crowley A+, Network+, Security+, MCT, MCSE, MCTS, MCITP: Enterprise Administrator / Messaging Administrator

You're welcome.I'm glad it works.Karl