Users can't access their archive mailbox in Outlook

  • Article
  • Applies to:
    Exchange Server 2016 Enterprise Edition, Exchange Server 2016 Standard Edition, Exchange Server 2013 Enterprise, Exchange Server 2013 Standard Edition

Original KB number:   3098940

Symptoms

Consider the following scenario:

  • The MAPI/HTTP protocol is disabled in an Exchange Server 2016 or Exchange Server 2013 organization.
  • The MAPI/HTTP protocol is enabled at the mailbox level for one or more users.

In this scenario, users who have MAPI/HTTP enabled can't access their archive mailbox in Outlook.

Note

The issue may occur even after the MAPI/HTTP protocol is enabled for the organization.

Cause

This issue occurs because Exchange Server returns RPC/HTTP information for a MAPI/HTTP autodiscover request when the MAPI/HTTP protocol is disabled in the Exchange organization.

Workaround - Method 1

Use Microsoft Outlook Web App or Microsoft Outlook on the web instead of using Outlook.

Workaround - Method 2

Disable the MAPI/HTTP protocol for the affected users by running the Set-CASMailbox cmdlet as follows:

Set-CASMailbox <Alias> -MapiHttpEnabled $False

Workaround - Method 3

Enable the MAPI/HTTP protocol for the organization by running the Set-OrganizationConfig cmdlet as follows:

Set-OrganizationConfig -MapiHttpEnabled $True