What are POP3 and Default POP3 Port Numbers? Every email service listens to a specific port to deliver services. Still need help? Go to Microsoft Community.In this tutorial, you’ll learn most commonly used Email protocols and port numbers such as POP3, IMAP and SMTP on the Internet for email services.Įmail servers across the Internet use protocols for sending and retrieving emails. To disable EWS for an Exchange Online mailbox, run the following cmdlet: Set-CASMailbox -EWSEnabled $False To enable EWS for an Exchange Online mailbox, run the following cmdlet: Set-CASMailbox -EWSEnabled $True Enable or disable Exchange Web Services (EWS) for an Exchange Online mailbox To use the Exchange admin center, see Enable or disable Exchange ActiveSync for a mailbox. To disable Exchange ActiveSync for a specific user, run the following cmdlet: Set-CASMailbox -ActiveSyncEnabled $False To enable Exchange ActiveSync for a specific user, run the following cmdlet: Set-CASMailbox -ActiveSyncEnabled $True Enable or disable Exchange ActiveSync for an Exchange Online mailbox To use the Exchange admin center, see Enable or disable Outlook on the web for a mailbox. To disable Outlook on the web for a specific user, run the following cmdlet: Set-CASMailbox -OWAEnabled $False To enable Outlook on the web for a specific user, run the following cmdlet: Set-CASMailbox -OWAEnabled $True Enable or disable Outlook on the web for an Exchange Online mailbox

To use the Exchange admin center, see Enable or disable MAPI for a mailbox. To disable MAPI for a specific user, run the following cmdlet: Set-CASMailbox -MAPIEnabled $False

To enable MAPI for a specific user, run the following cmdlet: Set-CASMailbox -MAPIEnabled $True To disable IMAP for a specific user, run the following cmdlet: Set-CASMailbox -ImapEnabled $FalseĮnable or disable MAPI for an Exchange Online mailbox To enable IMAP for a specific user, run the following cmdlet: Set-CASMailbox -ImapEnabled $True To disable POP3 for a specific user, run the following cmdlet: Set-CASMailbox -PopEnabled $FalseĮnable or disable IMAP for an Exchange Online mailbox To enable POP3 for a specific user, run the following cmdlet: Set-CASMailbox -PopEnabled $True Enable or disable POP3 for an Exchange Online mailbox

Before you run any of the commands in the following steps, first connect to Exchange Online by using remote PowerShell.

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