In a multi-tenant environment, you have an organization that contains many address lists (approximately 1,000). When you try to create a new profile or connect to Exchange Server 2013 by using MAPI-HTTP in your Outlook client, your attempts are unsuccessful. Additionally, you receive an error message that states that Outlook cannot open the mailbox.


This issue occurs because the dynamically allocated buffer is too small.

Cumulative update information

For Exchange Server 2013

To resolve this issue, install Cumulative Update 14 for Exchange Server 2013 or a later cumulative update for Exchange Server 2013.


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.


Learn about the terminology that Microsoft uses to describe software updates.

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