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Outlook 2010 stops updating folder with Exchange 2010

A couple of months ago, we migrated from Exchange 2003 to Exchange 2010 and the 2003 has since been decommissioned.  It wasn't an entirely smooth process because we've experienced some strange instances which most have been fixed.  Otherwise, the server is running fairly smoothly now.

Ever since we migrated, at random periods, some of my local Outlook 2010 users reported Outlook stopped updating mail folders because they noticed they weren't getting any new messages in their Inbox.  In the status bar, it shows a previous date/time when it was last updated instead of "All folders are up to date".  

Closing Outlook and restarting it resolves the problem temporarily.  Deleting the Mail Profile and re-creating it fixes it for a while.  Turning off Cached Mode fixes it, too, but we've also had a couple of remote users who need Cached Mode turned on for better performance.

Any ideas on why this is happening?
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wchestnut
Asked:
wchestnut
1 Solution
 
Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
How many CAS servers do you have ?
Was the old Exchange 2003 removed gracefully ?
Was there any DC removed as well ?
When the Outlook stops updateing ... what happens if you do a Send\Receive ?
Hope all Outlooks are in cache ... does OWA works ?

- Rancy
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wchestnutAuthor Commented:
Hi, Rancy!  Thanks for responding!

* One, Single Exchange 2010 Server, single LAN segment
* For the most part, 2003 was removed gracefully
* 2003 was a DC and it was removed relatively gracefully as well
* Honestly, haven't tried Send/Receive because it's not necessary with Exchange (will try if it happens again)
* Actually, because of this problem, most internal Outlooks are not cached, yes, OWA works
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Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
Look if the old server has some instance could be that Outlook try toconnect it due tos ome reason .... thats what i have seen many a times.

Outlook in Online mode .... isnt good as it creates performance issues on the client machine and Server as well :(

If possible have some Outlooks in cache just to see if the cache users have the issue at that same time as well :)

Do you also use a huge ActiveSync users conenction ?
Any issues\eventID's noticed on the server at the same time ?

- Rancy
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wchestnutAuthor Commented:
Ah-HA!  I think we're on to something.  Found this in the Application Event Log on the Exchange Server:

Mapi session "def1c67f-7271-4a00-8219-5605bfca0495: /o=XXXcn=Recipients/cn=USERHAVINGPROBLEM" exceeded the maximum of 500 objects of type "objtFolder".

I've seen this happen before with 2003.  Is this still a problem with 2010?
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Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
If users use some Search Add-ons it creates a lot of sessions on the server causing such issues .... i guess there was an article to increase it :)

What is the amount of RAM ... Users Mailbox database and few more detials.

- Rancy
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vicky19Commented:
Is your issue resolved as per suggestions given ?
If not please do let us know so we can assist you :)

Regards
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ExchangePanditCommented:
Please have one user use Outlook in Safe mode (disables add-ins) and keep the cache mode ON.  

Start-->Run-->OUTLOOK /SAFE

Keep an eye on it and lets see whether the issue reoccurs.

Also check the PC for Google Desktop Search or any other 3rd party desktop Search programs and remove it.

Please let us know if this helps.

cheers
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wchestnutAuthor Commented:
No, there are no 3rd party add-ons on any of our local Outlook clients or desktop search utilities.  Som of the users do have multiple Mailboxes open which can have many Folder in them.

The problem user in question (my boss) has 8GB of memory on Win 7 64-bit with Outlook 2010 and all Microsoft Updates applied.  His Outlook was complaining about not having enough memory but Task Manager showed he was using less than 3GB.

This did start when I granted him Full Permission on about 7 Mailboxes -- which we then found out Outlook added them automatically to the left Mail pane (this now happens with Exchange 2010 SP1).

I did notice his OST file was about 36GB is size, so one of the things I tried was to move all of the files in AppData to an ARCHIVE folder so it could rebuild them, then I re-started Outlook.  That didn't seem to help much until I disabled Cached Mode.

I ended up going back and removing the Full Permissions on all but 4 Mailboxes (he had about 12 before), then deleting his Mail Profile and re-creating it and leaving Cached Mode off on his office PC which now seems to be working fine.  He has a home computer with almost the same configuration, I deleted is Mail Profile and re-created it but left Cached Mode on since he's remote.  I haven't heard any complaints yet and it's been a couple of days now.

So everything seems to have settled down now.  I'm just going to conclude that Outlook has a problem dealing with so many extra Mailboxes in one Profile and we just need to keep the number down as well as all of the Mail Folders.
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Manpreet SIngh KhatraSolutions Architect, Project LeadCommented:
This did start when I granted him Full Permission on about 7 Mailboxes -- which we then found out Outlook added them automatically to the left Mail pane (this now happens with Exchange 2010 SP1 - Yes

I did notice his OST file was about 36GB is size, so one of the things I tried was to move all of the files in AppData to an ARCHIVE folder so it could rebuild them, then I re-started Outlook.  That didn't seem to help much until I disabled Cached Mode. - If youhave cache mode enabled and also select the option to cache shared mailbox and PF\Favourites it will surely spike the OST and Kill everything :(

If user wants to add many mailboxes with cache and cache them all they have to do very good administration of all mailboxes to that profile so that OST doesnt gets huge and causes issues :)

- Rancy
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wchestnutAuthor Commented:
Thanks, Rancy!
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