To Add a User or Security Group in Bulk over all the mailboxes in the Organization

Run each line by itself;

Line 1: $users = Get-Mailbox | Select -ExpandProperty Alias

Line 2: Foreach ($user in $users) {Add-MailboxFolderPermission $user”:\Agenda” -user NAMEOFUSER -accessrights Editor}


To Remove a User or Security Group from all the mailboxes in the Organization

Run each line by itself;

Line 1: $users = Get-Mailbox | Select -ExpandProperty Alias

Line 2: Foreach ($user in $users) {Remove-mailboxfolderpermission $user”:\Agenda” -user NAMEOFUSER}