Cannot open many mailboxes in Outlook simultaneously
We are running a new, clean install of Exchange 2013. One user has the requirement to be able to access all 50 other user mailboxes from a single Outlook client (I know this is not recommended, and why - but the user has a business need for this so if possible we'd like to make it happen).
The user sees this error message when trying to open some of the mailboxes, however:
"The set of folders cannot be opened. Your server administrator has limited the number of items you can open simultaneously. Try closing messages you have opened or removing attachments and images from unsent messages you are composing."
Previously (in Exchange 2007) we have worked around this by removing the MAPI session limit (http://technet.microsoft.com/en-us/library/dd159906(EXCHG.80).aspx) but I understand this is dealt with quite differently in Exchange 2013, with throttling.
I have followed the instructions to create and assign a new policy found here - https://migrationwiz.zendesk.com/entries/22713616-How-do-I-disable-the-Exchange-2013-throttling-policy- but this has had no effect.
Ignoring any potential performance issues (the server is hosted on Amazon Web Services and can be upgraded easily if more resources are required), how can we disable this limit, either for one or all users?
If possible step-by-step instructions would be great. Thanks in advance for any assistance!
The user sees this error message when trying to open some of the mailboxes, however:
"The set of folders cannot be opened. Your server administrator has limited the number of items you can open simultaneously. Try closing messages you have opened or removing attachments and images from unsent messages you are composing."
Previously (in Exchange 2007) we have worked around this by removing the MAPI session limit (http://technet.microsoft.com/en-us/library/dd159906(EXCHG.80).aspx) but I understand this is dealt with quite differently in Exchange 2013, with throttling.
I have followed the instructions to create and assign a new policy found here - https://migrationwiz.zendesk.com/entries/22713616-How-do-I-disable-the-Exchange-2013-throttling-policy- but this has had no effect.
Ignoring any potential performance issues (the server is hosted on Amazon Web Services and can be upgraded easily if more resources are required), how can we disable this limit, either for one or all users?
If possible step-by-step instructions would be great. Thanks in advance for any assistance!
ASKER
Yes I do see event 9646, although it doesn't coincide with the time when we're trying to access the mailboxes. Also I notice that the Outlook client is able to open exactly 32 mailboxes (including the user's own).
The question you posted the link to refers to SBS2003 (so Exchange 2003). Are you saying the same registry key applies to Exchange 2013?
HKEY_LOCAL_MACHINE\SYSTEM\
Value: Disable Session Limit
Data: 1
The question you posted the link to refers to SBS2003 (so Exchange 2003). Are you saying the same registry key applies to Exchange 2013?
HKEY_LOCAL_MACHINE\SYSTEM\
Value: Disable Session Limit
Data: 1
ASKER
Just tried the registry key above and restarted the information store - no change. Interestingly the mailboxes that won't open are the same ones from before the information store was restarted - could this be relevant?
registry keys values are same for all version..
What about ADD on? have you disable add on's for outlook ?
enable disable addon's on outlook
http://www.msoutlook.info/question/88
What about ADD on? have you disable add on's for outlook ?
enable disable addon's on outlook
http://www.msoutlook.info/question/88
You need to setup a new throttling policy for that user so that they can open more mailboxes.
http://technet.microsoft.com/en-us/library/dd351045(v=exchg.150).aspx
Simon.
http://technet.microsoft.com/en-us/library/dd351045(v=exchg.150).aspx
Simon.
ASKER
I just disabled the add-ons: no change.
I already tried a new throttling policy as detailed above. Which parameter in particular should I be using?
I already tried a new throttling policy as detailed above. Which parameter in particular should I be using?
ASKER
After adding the following registry keys:
[HKEY_LOCAL_MACHINE\SYSTEM
"DatabaseType"=dword:00000
"Maximum Allowed Sessions Per User"=dword:00000080
"Maximum Allowed Service Sessions Per User"=dword:00000080
"Disable Session Limit"=dword:00000001
I can now open 38 mailboxes rather than 32 (I need to open 46), but now get a different error:
"Cannot expand the folder. The set of folders cannot be opened. Microsoft Exchange is not available. Either there are network problems or the Exchange server is down for maintenance".
[HKEY_LOCAL_MACHINE\SYSTEM
"DatabaseType"=dword:00000
"Maximum Allowed Sessions Per User"=dword:00000080
"Maximum Allowed Service Sessions Per User"=dword:00000080
"Disable Session Limit"=dword:00000001
I can now open 38 mailboxes rather than 32 (I need to open 46), but now get a different error:
"Cannot expand the folder. The set of folders cannot be opened. Microsoft Exchange is not available. Either there are network problems or the Exchange server is down for maintenance".
ASKER CERTIFIED SOLUTION
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ASKER
Answered question myself. Experts' comments did not lead to solution.
also refer below link see if this helps
https://www.experts-exchange.com/questions/24735256/Your-server-administrator-has-limited-the-number-of-items-you-can-open-simultaneously-Try-closing-messages-you-have-opened.html