Mapi session “%1” exceeded the maximum of %2 objects of type “%3”.

Details
Product: Exchange
Event ID: 9646
Source: MSExchangeIS
Version: 8.0
Symbolic Name: msgidExceedMaxObjsError
Message: Mapi session “%1” exceeded the maximum of %2 objects of type “%3”.
   
Explanation

This Error event indicates that a MAPI session tried to open more than the maximum number of objects. MAPI is a protocol that is used by Microsoft Exchange clients such as Microsoft Office Outlook to connect to the server that is running Exchange Server. By default, each object type, such as Folder, Message, and Attachment, has been assigned a limit per MAPI session.

   
User Action

To resolve this error, follow these steps:

  1. Investigate any third-party applications or add-ins that are running on the computer of the user specified in the event description of event MSExchangeIS 9646. If the third-party application or add-in is opening too many objects or is leaving too many objects open on the server, other clients may not be able to log on to the server. For more information, see Microsoft Knowledge Base article 830829, Your Exchange Server 2003 computer may stop responding after a MAPI client opens more than the default value of certain server objects.

  2. Investigate the functionality of any batch file or scripts that you may be using to send messages. If the batch file or script is not correctly closing MAPI sessions, other clients may not be able to log on to the server. For more information, see Microsoft Knowledge Base article 830836, Event ID 9646 is logged when you try to send many messages in Exchange Server 2003.

  3. Monitor the MAPI session specified in the event description to exclude any unusual activities associated with this MAPI session.

Increase the default maximum limit for the object type specified in the event description by editing the registry.

Related:

Leave a Reply