Hi Markus,
Zu Deinen Problem mit den 1000 Foldern, koenntest Du Dir mal die Throttling Einstellungen fuer EWS ansehen:
http://blogs.msdn.com/b/exchangedev/archive/2010/03/12/throttling-policies-and-the-ewsfindcountlimit.aspx
In der Standard-Policy ist das naemlich auf genau 1000 beschraenkt:
Get-ThrottlingPolicy | FL EWSFindCountLimit
-> EWSFindCountLimit : 1000
Auch Clients wie bspw. Lync haben damit ein Problem und koennen Ihren "Conversation History" Ordner dann nicht finden. Blackberry nutzt meines Wissens (teilweise) ja auch EWS und evtl. lauft Ihr da auch in das Limit.
Zu den Limits hinsichtlich der Anzahl der Elemente pro Folder (nicht die Anzahl der Folder selbst), kenne ich folgende Links:
-> Understanding the Performance Impact of High Item Counts and Restricted Views:
http://technet.microsoft.com/en-us/library/cc535025.aspx
Ideally, it is best to keep the Inbox and Sent Items folders less than 20,000 items, and the Contacts and Calendar item counts less than 5,000. Even when maintaining item counts that are at or under the recommended maximum values, there are some operations
which may still take noticeable time (usually this is approximately one minute).
-> Finding High Item Count Folders Using the Exchange Management Shell:
http://blogs.technet.com/b/exchange/archive/2009/12/07/3408973.aspx
Since there are different folder item limits for each version of Exchange, I thought it might be beneficial to write a script that could analyze folders on all versions, and determine if they were over their limit. The limits are as follows:
Version Folder Item Limit
Exchange 2000/2003 5,000
Exchange 2007 20,000
Exchange 2010 100,000
It should be noted that these numbers are just the Microsoft recommended limits. Actual numbers could vary greatly depending on how many users are over the limit, the way mailboxes are being accessed (i.e. Outlook Cached Mode, Outlook Online Mode, via Mobile
Phone, etc.) as well as certain 3rd party application integration.
VG, Timo
