Question:How To Hide Multiple Users From Exchange 2007 / 2010 / 2013 GAL Using PowerShell

If you need to hide multiple users from Exchange Server 2007 /2010 /2013 from the GAL using PowerShell you can use the cmdlet below for Users with Mailbox or just for Mail contact:

1. Create a text file with the list of users in and call save it as Users.txt

2. Open EMC and run the cmdlet below to Hide:

get-content users.txt | Set-Mailbox -HiddenFromAddressListsEnabled $true

Tu Un-Hide use:

get-content users.txt | Set-Mailbox -HiddenFromAddressListsEnabled $false

If you have a mail contact just use the cmdlets below:

get-content users.txt |Set-MailUser -HiddenFromAddressListsEnabled $true

get-content users.txt  |Set-MailUser -HiddenFromAddressListsEnabled $false