Outlook / Exchange 2010 shared calendars performance

Hi, we are using Outlook 2010 connecting to Exchange 2010 over a WAN (120ms average RTT). Cached mode is forced on all clients. Our users are finding that performance of shared calendars is very poor in "online" mode. However as they are all using Outlook
2010, checking "download shared folders" means that ALL secondary mailbox folders are cached and we don't want this to happen. Users are typically PAs who have been granted full mailbox access to their exec's mailbox. These users may have several shared calendars
open at once which makes the situation even worse.
Is there a way that we can revert Outlook 2010 to the previous 2007 behaviour whereby with secondary mailboxes only the calendar / contacts etc are cached? I have seen articles referring to a reg value "CacheOthersMail" that can be added but this seems to
have no effect on a couple of clients we've tried - if the "download shared folders" option is checked, everything is still cached, and if it's unchecked, everything switches to "online".
Any help appreciated,
Nick

Yes, setting that registry key to 0 should do the trick. You might need to recreate the mail profile though or recreate the ost-file to directly get rid of what is currently being cached.
As you've currently forced the caching by a GPO, check your policy keys as well.
See; http://www.msoutlook.info/question/561
Robert Sparnaaij
[MVP-Outlook]
Outlook guides and more: HowTo-Outlook.com
Outlook Quick Tips: MSOutlook.info

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I had the same problem where I could open a shared calendar in OWA but it would not work in Outlook 2010. When I clicked on the shared folder I got the error message 'outlook cannot open this folder'. The problem ended up being that the person
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Hello,
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Does this issue occur on Outlook only or both Outlook and OWA?
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Outlook 2010 shared calendars

I work at Pensacola State College. We recently upgraded our Exchange servers to 2013. Our staff is using Outlook 2010. We have about a half dozen calendars that are shared among our admin staff of about 10 people (resources, not individual
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Hi,
According to your description, I understand that there are 2 users always losing Editor permission for 3 shared calendars. Is there any error message or error logs when the issue occurs? Please collect it for further analysis.
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http://office.microsoft.com/en-us/outlook-help/best-practices-when-using-the-outlook-calendar-HA104004449.aspx
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Hi,
We have a mixed Exchange 2003/Exchange 2010 environment while we migrate our mailboxes over to Exchange 2010.
We use code that is used to connect to meeting room calendars still on Exchange 2003and then display the information on big tv screen at the entrance to the building.
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good afternoon,
I have a problem:
A user has received permissions on a shared calendar but this does not include the 'remove' option.
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Hi,
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We have the following environment -
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15:59:56 Synchronizer Version 14.0.6126
15:59:56 Synchronizing Mailbox 'Nigel'
15:59:56 Synchronizing server changes in folder 'Naomi - Calendar'
15:59:56 Downloading from server 'outlook.cri.camres.org'
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15:59:56                                 You do not have sufficient permission to perform this
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15:59:56                                 Microsoft Exchange Information Store
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Hi
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Outlook 2013 treating Shared Calendars differently

I did try to ask this in a
different forum, but was pointed to this one:
This question encompasses a few Microsoft products, but I think this is the best place to ask the question because the actual issue is Outlook 2013 for Windows desktop.
We have Outlook connecting to a couple of different kinds of Shared Calendars. The problem is it is only performing appointment reminders for one of the kinds.
The one that IS working: a shared calendar created by creating a Room on a Windows Phone. When anyone in the Room creates an appointment with a reminder on that calendar, the reminder goes off in each user's Outlook 2013.
The one that IS NOT working: a shared calendar created in Exchange Online. When any member of that shared mailbox creates an appointment with a reminder on that calendar, the reminder DOES NOT go off in each user's Outlook 2013.
The question: How do we get the reminders to work in the second case?

Are the room calendar appointments added to the user's default calendar in Outlook? If so, they will get a reminder in Outlook. (They aren't added to my calendar here - I only get a reminder on my phone - the Room lives only on my phone.)
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Exchange 2013 - Shared Calendar problems

Since we put in Exchange 2013 in July 2013 we have had a problem with Shared Calendars. Even though a User has Owner Permission on another Calendar, New Appointment is Grayed Out and the User cannot add or amend and occasionally Outlook will hang.
We have tried Outlook 2010 and 2013 Clients as well as Cached Mode and Online Access. Exchange Server Standard 2013 CU2 was installed and this seemed to stop the problem for a while and now it has returned.
Permissions have been removed and reapplied both through the Exchange Powershell Interface and on the Mailbox. All other aspects of the system seem fine.
Any advice would be welcome.

Hi,
Please check your application logs in your Exchange server. Confirm whether there are some error logs such as Event 9646.
It may because there are too many users connect to shared calendar at the same time that cause this issue. And there is a limit on the number of items that clients can open.
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Exchange 2010 Room Calendar Permissions are too permissive when Default is set to None.

Help! Room Calendar permissions are too permissive when Default is set to None.
We are a brand new Exchange 2010 shop, and have setup several conference rooms. Many of them are restricted to specific groups to book via In-Policy Requests using Resource Booking Attendant. The Room Calendar permissions for most
rooms shows only two options for the Default access: None and Full Details. Default is set to None, yet if someone opens the room calendar in Outlook (& they are not part of the In-Policy restrictions) they are able to see the full meeting details
(even open the meeting for full details). How is this possible when by default they should not have any access as it is set to None? Some rooms would not be a problem for clients to see the details, but some rooms like Executive rooms need to be
locked down so that others cannot see the room details - None.
I also found this, although it did not make a difference. If I create an Outlook profile for the room and login as the room calendar in Outlook, go to File, Options, Calendar, Resource Scheduling, Set Permissions I get different default options:
None, "Free/Busy time", "Free/Busy time, subject, location" and Full Details. Why do I have more options in this view rather than the Room Calendar Permissions? I looked at two rooms and both Default options were set to "Free/Busy
time", so I changed these settings to None. Still the clients can view the full room calendar details. What are we missing to get the room calendar locked down so it is not displaying details to everyone?

Only the default groups and Exchange Admins have Full Access to these items, so that is not the issue.
-MailboxFolderPermission 1RP07AWest:\Calendar cmdlet and it shows the same access I see when I open the calendar in Outlook and view the Permissions as shown below - Default is set to None.
As I stated in my last reply the only thing that finally forced it to be blocked is changing the Resource Scheduling permissions under Options > Calendar for that room mailbox. If I have to do that for each room calendar, it's going to
take considerable time to change each one. Is there a cmdlet to allow me to access and change that setting as well?
RunspaceId   : ea4ebc26-1d22-4a7d-b115-1b609099bae3
FolderName   : Calendar
User         : Default
AccessRights : {None}
Identity     : Default
IsValid      : True
ObjectState : New
RunspaceId   : ea4ebc26-1d22-4a7d-b115-1b609099bae3
FolderName   : Calendar
User         : Anonymous
AccessRights : {None}
Identity     : Anonymous
IsValid      : True
ObjectState : New

Outlook / Exchange 2010 shared calendars performance

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