Exchange Server Forums

sporadic slow logon times for OWA

Users viewing this topic: none

Logged in as: Guest

Printable Version

All Forums >> [Microsoft Exchange 2007] >> Outlook Web Access >> sporadic slow logon times for OWA

Page: [1]

Message

<< Older Topic Newer Topic >>

Limited time MSExchange.org offer! -- 1.Sep.2008 1:00:00 PM

TechGenix and SolarWinds have partnered to provide free copies of SolarWinds Exchange Monitor to all visitors who join the MSExchange.org Forums. SolarWinds Exchange Monitor is a handy desktop dashboard that continuously monitors Microsoft Exchange to deliver real-time insight into Exchange services, mail queue sizes, and host server health. Learn more about Exchange Monitor and the free offer!

sporadic slow logon times for OWA - 6.Jul.2008 2:20:31 PM

brian_WI

Posts: 1
Joined: 6.Jul.2008
Status: offline

hi all-

i'm in the process of transitioning over to Ex2007 and have run out of ideas on this one...

occasionally (maybe 1 out of 20+), logging into OWA 2007 is extremely slow. the initial FBA welcome screen displays immediately, but after entering credentials, it may take 20-100 seconds to authenticate and have the Inbox display. once in the Inbox, performance is perfectly fine again.

this happens on the LAN and WAN...with and without ISA inbetween, etc. so, it's somewhere between the CAS and AD i believe.

summary of my config:

load balanced ISA 2006 w/ FBA
two CAS via NLBS
CCR mailbox cluster
legacy Exchange 2003 cluster on Windows 2003
all Exchange 2007 servers are Windows 2008

the frustrating part is there is nothing in any event logs and a comparison of a good and bad logon via packet trace doesn't show much. what else is there to look for?

thanks for any input!

< Message edited by brian_WI -- 6.Jul.2008 2:22:08 PM >

Post #: 1

Featured Links*

RE: sporadic slow logon times for OWA - 15.Jul.2008 9:47:01 PM

karbo

Posts: 16
Joined: 31.Jan.2008
Status: offline

Check the IIS logs and possible the HTTPErr logs on the CAS box for long running operations or errors that may be hiding there. Possibly compare this to the IIS logs on the MBX server.

Also, make sure your NIC drivers are up-to-date and that TCPChimney is disabled.

The packet trace may at least show what requests/responses (to from whom) are taking a long time.. There may be a performance issue that you just happen to hit at the right time. The IIS logs or network trace should at least show something.

Karbo

(in reply to brian_WI)

Post #: 2