Enable or Disable POP3 or IMAP4 access for a user

By default, POP3 and IMAP4 are enabled for all users in Exchange Online. You can disable them for individual users. For additional information related to POP3 and IMAP4, see POP3 and IMAP4.

What do you need to know before you begin?

Tip

Having problems? Ask for help in the Exchange forums. Visit the forums at Exchange Online or Exchange Online Protection.

Use the EAC to enable or disable POP3 or IMAP4 for a user

  1. In the EAC, navigate to Recipients > Mailboxes.

  2. In the result pane, select the user for which you want to enable or disable POP3, and then click Edit Edit icon.

  3. In the User Mailbox dialog box, in the console tree, click Mailbox Features.

  4. In the result pane, under Email Connectivity, do one of the following:

  • To enable POP3 for the user, under POP3: Disabled, click Enable.

  • To enable IMAP4 for the user, under IMAP4: Disabled, click Enable.

  • To disable POP3 for the user, under POP3: Enabled, click Disable.

  • To disable IMAP4 for the user, under IMAP4: Enabled, click Disable.

  1. Click Save.

Use Exchange Online PowerShell to enable or disable POP3 or IMAP4 for a user

This example enables POP3 for the user Christa Knapp.

Set-CASMailbox -Identity "Christa Knapp" -POPEnabled $true

This example enables IMAP4 for the user Christa Knapp.

Set-CASMailbox -Identity "Christa Knapp" -IMAPEnabled $true

This example disables POP3 for the user Christa Knapp.

Set-CASMailbox -Identity "Christa Knapp" -POPEnabled $false

This example disables IMAP4 for the user Christa Knapp.

Set-CASMailbox -Identity "Christa Knapp" -IMAPEnabled $false

How do you know this worked?

  1. In the EAC, navigate to Recipients > Mailboxes.

  2. In the result pane, select the user for which you want to enable or disable POP3 or IMAP4, and then click Edit.

  3. In the User Mailbox dialog box, in the console tree, click Mailbox Features.

  4. In the result pane, look under Email Connectivity.

  • If POP3 is disabled for the user, you will see POP3: Disabled.

  • If IMAP4 is disabled for the user, you will see IMAP4: Disabled.

  • If POP3 is enabled for the user, you will see POP3: Enabled.

  • If IMAP4 is enabled for the user, you will see IMAP4: Enabled.

  1. Click Save.