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Exchange server not responding messages in outlook

I have a citrix farm consisting of 2 citrix presentation servers on windows 2003 sp2.  Recently in the last month or so users have started complaining that they keep getting Exchange server not responding in outlook.  I have done some performance testing and not found anything to try and resolve the issue.  The server are both 2.8 ghz intel processors with 4 gigs of ram each.  I have maybe 5 or 6 users on each server at any one time.  When it happens they seems to very little network activity(Nothing more than usual maybe 10%) i have 100 gigs of HD space left on each server. Hard drive and CPU performance are normal.  I have checked the exchange server.  (It's a windows 2000 server with 4 gigs of ram running Exchange 2003 sp2)  It also has GFI mail essentials on it for Spam.  Exchange server seems to be doing very little when it happens also.  I only have 15 users and very rarely are they all in at once.  Some of their mailboxes are very large,(Average is about 1.2 gigs) 1 as large as 2 gigs.  I have cleaned out anything older than 30 days from their mailboxes.  (They get a lot of large attachments here 10 meg to 15 meg PDF files)  But the problem does not happen when accessing them it can just be opening a new mail message to tell boxx you are going to lunch.  Citrix servers have Sales Logix, Calyx Point, Adobe reader, Office 2003 standard edition, and quickbooks.  I just can't figure it out.  I haven't made any changes to the system and all of a sudden it just started. (I do reboot the servers usually once per month, lately more often for the citrix servers) Sometimes outlook will hang for a user and i have to end their citrix session error below.

Event Type:      Error
Event Source:      Application Hang
Event Category:      (101)
Event ID:      1002
Date:            11/26/2007
Time:            2:41:17 PM
User:            N/A
Computer:      SMART-CITRIX2
Description:
Hanging application OUTLOOK.EXE, version 11.0.6565.0, hang module hungapp, version 0.0.0.0, hang address 0x00000000.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 41 70 70 6c 69 63 61 74   Applicat
0008: 69 6f 6e 20 48 61 6e 67   ion Hang
0010: 20 20 4f 55 54 4c 4f 4f     OUTLOO
0018: 4b 2e 45 58 45 20 31 31   K.EXE 11
0020: 2e 30 2e 36 35 36 35 2e   .0.6565.
0028: 30 20 69 6e 20 68 75 6e   0 in hun
0030: 67 61 70 70 20 30 2e 30   gapp 0.0
0038: 2e 30 2e 30 20 61 74 20   .0.0 at
0040: 6f 66 66 73 65 74 20 30   offset 0
0048: 30 30 30 30 30 30 30      0000000


0
charles18602
Asked:
charles18602
1 Solution
 
mcse2007Commented:
Try archiving old emails from these users' mailbox and see if this helps - perhaps this is also contributing to your problem (They get a lot of large attachments here 10 meg to 15 meg PDF files). Archive everything except for 7 days old emails.

Also, a good practice from keeping your Exchange server healthy is set a policy mailbox limit so it won't overwhelm the exchange from processing the client request.

policy mailbox limit:
60Mb Mailbox inbox max limit
80MB mailbox sent max limit
100mb mailbox sent/inbox combine locked account - time to do some house cleaning (e.g run archive in outlook).



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