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Outlook 2010 Unable to Display the folder:


I have a problem opening my mailbox in Office 2010.
After I click in a few folders I receive the error:
Unable to Display the folder:
Microsoft Outlook cannot access the specified folder location. 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.

This doesn't happen with Outlook 2003...

I must note that I have a mailbox of 4GB with a lot(!) of folders in it.

Any help would be appreciated!

With kind regards,
2 Solutions
Alan HardistyCommented:
Are you running in Cached Exchange Mode?
If you are, please close Outlook, delete your local .OST file and then open up Outlook again and let it re-generate the local .OST file.
You may also need to add the following registry key to the server to stop the problem:
Disable the session limit by setting the following value to 1
Value: Disable Session Limit
POSysteembeheerAuthor Commented:
Thank you for your quick response!

No, I'm not in cached mode. If I use cached mode, it works (I mean, it doesn't crash), but it extremely slow because Outlook is continiously syncing the folders (around 1000 folders).

I;m using Exchange 2007, so I can't find the regkey.

Any other suggestions?
Alan HardistyCommented:
In cached mode, Outlook only needs to sync everything once, then it only syncs the changes, unless you are permanently moving items and folders around this should not be a problem.
If it works in Cached mode, I would recommend you use cached mode.  If you don't use cached mode, Outlook has to drag everything across the network every time you open it up, which will no doubt take an age.  Also if the server goes off-line, you won't be able to do anything or read any existing emails.
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POSysteembeheerAuthor Commented:
Unfortunately this is also not an option.
Cached mode is really slow (even if all the folders are synced) and when all my collegae's receive a new e-mail I get is a few minutes later. That isn't what I want.

If ind it strange that it works in Outlook 2003 and not in 2010 (or 2007 for that matter)..
To resolve this issue, assign the Create named properties in the information store permission to the Everyone group. To do so, follow these steps:
1 Start the ADSI Edit tool.
2 Expand Configuration Container, and then expand CN=Configuration, DC=Domain,   DC=com.
3 Expand CN=Services, and then expand CN=Microsoft Exchange.
4  Right-click CN=Organization, and then click Properties.
5 Click the Security tab.
6 In the Name list, click Everyone, and then in the Permissions list, click to select the Allow check box that is next to the Create named properties in the information store permission.
7 Click Advanced.
8 Click the Permissions tab.
9 In the Permission Entries box, click the entry for the Everyone group that has the Create named properties in the information store permission, and then click View/Edit.
Click the Object tab.
10 In the Apply onto box, click This object and all child objects, and then click OK.
11 Click OK, and then click OK.
Alan HardistyCommented:
Looking at this previous EE question, it seems to suggest a re-installation of Outlook cured their problem (Outlook 2007):
Are your colleagues using cached mode or non-cached mode?
Alan HardistyCommented:
@yashinchalad - Where did that come from?
POSysteembeheerAuthor Commented:
@yashinchalad: I'm a bit sceptical about that one.
What should that fix?

My collegues are all on non-cached mode. It works fine for them.
But then again, they don't have such a large mailbox.
There is one other collegue with the same problem, also a huge mailbox with a lot of folders.
Alan HardistyCommented:
I think that if you need to continue to use non-cached mode, then you need to trim your mailbox down to a sensible size.  4Gb is way too big.
Sadly cached mode is slower than non-cached mode, but if all users are setup the same way, then there will not be a performance difference.
Cached mode has the advantage of keeping a local copy in case the server get's abducted by aliens or goes to meet the maker in the sky, but then if you are taking proper backups, this should not be an issue.
If you are seeng similar problems with users with large mailboxes, then that suggests that the problem is only occuring due to the size of the mailbox, not the client or the way it is configured.
You have to consider while having a large mailbox in Exchange 2007 the limits of the folders: for email items should be kept below 20000 item and on a Contacts and Calendar folder item counts should be kept below 5,000
This can explain why you can not access a specified folder, hence you can still make subfolders and move some items into them
For the cached mode performance, you are right: the performance will be slower because that will depend on your PC resources, adding more RAM might help improve the cashed mode  
POSysteembeheerAuthor Commented:
Thanks for all the reactions.

I checked the item-count (48412), so yeah I guess I'm above the 20.000 item-limit.
It does leave one question: Why is it working in Outlook 2003 (non cached) and not in Outlook 2007 or 2010?

btw. essam_142:, Is there a link or some documentation about this limit?

Alan HardistyCommented:
There is a good article here about limits direct from the Microsoft Exchange Team:
POSysteembeheerAuthor Commented:
Hmm.. The article states that if items are not placed in the critical folders (inbox, contacts and calendar) there should be no problem. That is the case here. I have  almost 1000 folders.
But I think I get the big idea.. Spring cleaning of my mailbox...

Alan HardistyCommented:
Yep - I think you need to shrink your mailbox down to a more manageable size.
I have users with 5Gb of mail and they use cached mode (Outlook Anywhere) without any problems, so it may be a 'feature' of non-cached mode!
POSysteembeheerAuthor Commented:
There's no right or wrong here. Just wish I could get the golden solution.

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