Get-Mailbox –Server <ServerName> Set-CASMailbox –POPEnabled:$False
Get-Mailbox –Server <ServerName> Set-CASMailbox –IMAPEnabled:$False
Some Tech Stuff
Get-Mailbox –Server <ServerName> Set-CASMailbox –POPEnabled:$False
Get-Mailbox –Server <ServerName> Set-CASMailbox –IMAPEnabled:$False