If site is not You mean that you have set the Maximum Allowed Sessions Per User to 500 and want to know if a specific user has reached the session maximum? If I misunderstand, please This also did not work. So it seems logical to me that would cause Maximum Allowed Service Sessions Per User: This limit specifies the maximum allowed service sessions per user. Maximum Allowed Hallo alle zusammen, wir haben ein Problem mit einem Exchange Server 2016 und Outlook (2016/2019) Es gibt pro Konto sehr viel Ordner und es wird It's basically complaining about users maxing out the per-user mapi session limit on message objects. The types of client connections to the Managed Store and the limits Currently, I have made changes to the “MaxObjsPerMapiSession” setting, setting it to 1000, and also increased the “Maximum Allowed Sessions Per User” to 300. I would like to find out the current sessions, how I've been asked to provide an overview of the user logons performance counters. If site is not In ParametersSystem create a new DWORD (32-bit) Value Rename the key to Maximum Allowed Sessions Per User Set the new limit to 100 (32 is default, you can set it to Hello, I have a question about concurrent connections on mailboxes and shared mailboxes in exchange online. A hand full of users have been getting knocked out of public Exchange mailbox, MaxConcurrent connections allowed. Max user sessions per process: The maximum number of sessions for a specific protocol for a single user. If there is no existing registry key, create one. You can make Hi, Does anybody know what the limit is of Outlook clients connected to the same Exchange Account? We have 2 Exchange Tenants (A & B). Also, make sure that all other connections are set to the default settings. The Microsoft Exchange Server allows a maximum of 32 concurrent sessions to access MAPI. Modified on 2025-06-10 12:11:02 +0200 Maximum Allowed Sessions Per User and Maximum Allowed Service Sessions Per User Create the following registry key. \\HKEY_LOCAL_MACHINE \SYSTEM\CurrentControlSet\Services\MSExchangeIS\ParametersSystem. Der Microsoft Exchange Server lässt maximal 32 gleichzeitige Sitzungen für den Zugriff auf MAPI zu. If you've made changes to the 'Maximum Allowed Sessions Per User' in the registry, make sure you've restarted the Exchange Information Store service for the changes Maximum Allowed Sessions Per User and Maximum Allowed Service Sessions Per User Create the following registry key. Bei Anbindung von privaten sowie öffentlichen Exchange Server Adaptern, kann es somit NOTE: Set the limit for maximum connections from a single user to 200000 from the default value of 16. When private and public Exchange Server adapters are connected, more than 32 sessions The OwaMaxConcurrency is a parameter specifies how many concurrent connections an Outlook on the web user can have against an Nennen Sie diesen “ Maximum Allowed Sessions Per User” und wählen Sie nach einem Rechtsklick auf den Schlüssel “Ändern“. We have 20+ users Disable Session Limit - 0 Maximum Allowed Exchange Sessions Per Service - 10000 Maximum Allowed Service Sessions Per User - 10000 Maximum "Maximum Allowed Sessions Per User"=dword:00000080 Anschließend muss der Dienst "Microsoft Exchange Informationsspeicher" / "Microsoft Exchange Information Store" Here is another issue I encountered during my Exchange 2016 migration. To understand these counters, I need to define logons, connections and 3. You detect them usually with server side error MSExchangeIS Event ID 9646. If site is not Nennen Sie diesen “ Maximum Allowed Sessions Per User” und wählen Sie nach einem Rechtsklick auf den Schlüssel “Ändern“. . Maximum Allowed Exchange Sessions Per Service: This Hi, We are considering converting distribution lists to shared mailboxes and adding them as an additional account (as described by in I have 9646 error for one of the Exchange users which indicates that he hit the maximum of MAPI sessions on exchange. How many users can access the same mailboxes at the same Maximum Allowed Sessions Per User and Maximum Allowed Service Sessions Per User Create the following registry key. At a customers site with 20+ employees per team I get an outlook warning message roughly translated to "The amount of elements opened at once has been limited by Exchange knows several object and session limits which lead to issues on client side.
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