Longterm internet connection failure

Suddenly while surfing my internet connection dropped out. I am using an "unwired" modem connected by ethernet. I tried replacing the ethernet cable, it did nothing. I tried the modem on another computer and could get connection. On my computer i ran Network diagnostics which showed the built-in ethernet was fine, the network settings were fine, and the ISP, ineternet and server were all failed.
The modem showed adequate reception but the status light at the back for PC activity was blank. I contacted the ISP helpdesk and they could detect the modem but not my computer. At a loss I backed everything up and started again from scratch, deleting everything and rebooting.
And SUCCESS ... for three days.
And so it begins again. This time I ran diagnostics in disc utility also and came up with nothing. I tried Mac support and the only suggestion the internet trouble shooting document had which I hadn't tried was to run a hardware test, unfortunately my macbook did not come with a hardware test disc and so I am out of options.
Rebooting every three days doesn't seem like a very practical solution. Any suggestions would be much appreciated.

I have tried changing the ethernet cabl, it made no difference. I tried tghe modem (and both ethernet cables) on a different computer and there were no problems. I tried all of that sort of stuff first before I tried rebooting. Cheers though

Similar Messages

  • Safari - Internet Connection Failures

    My fathers Mini Mac has started to play up when using Safari. When surfing, the connection will appear to have been lost and no page can be loaded. The only apparent solution is a restart.
    I downloaded Google Chrome to see if that was affected in the same way. It appears to be affected too.
    What is strange though, is that Mail seems to run and connect fine after the browser failure. My iPhone has a full internet connection, so no problems with the wireless.
    Any ideas?

    Hi,
    Make sure it's not a proxy...
    Open System Preferences / Network then click the Advanced button then select the Proxies tab.
    If any of the boxes are checked on the left under: Select a protocol to configure: Deselect the boxes then click Ok.
    Restart the Mac.
    And just to make sure it's not a connection issue, click the Assist Me button then click Diagnostics in System Preferences / Network. If any of the buttons on the left are red, click Continue.
    Carolyn

  • Internet connection failure Power Mac G5 (tower)

    Internet connection fails via HS cable to modem to ethernet configuration
    G5 2.5, OSX 10.4.11, Safari .... also tried Firefox
    Cable installer technician made several attempts to configure Network System Preferences
    All wires and external modern are new
    I am still able to connect to internet via phone; Dial up
    Two PC laptops connected successfully via same HS cable to modem to ethernet config
    Connection with laptops required only resetting modem, without Network System Pref adjustments

    Internet connection failure Part 2: Power Mac G5 (tower)
    Thanks for the welcome and your assistance
    About This Mac > More Info... > Network
    Lots of data here, seems to match info:
    System Prefs > Network > Built-in Ethernet >TCP/IP
    Network > Network Status
    • Built-Ethernet : Built-in Ethernet is currently active and has the IP address
    71.239.164.212. You are connected to the Internet via Built-in Ethernet.
    Safari :
    sits blank to any http typed, with progress bar frozen
    You are not connected to the Internet.
    Safari can’t open the page “http://www.google.com/” because your computer isn’t connected to the Internet.
    .... Activity Monitor reads: 2.35 KB/sec ( and is fluctuating ) to 6.88 KB/sec
    Assist me .... > Network Diagnosis
    Network Status ( all LED are green )
    • Built-in Ethernet
    • Network Settings
    • ISP
    • Internet
    • Server
    Proceeding through the navigation buttons, all is Green
    Final Message Reads: Your Internet connection appears to be working correctly.
    .... Activity Monitor reads: 2.56 KB/sec ( and is fluctuating )
    Network Utility > Ping test
    .... 10 packets transmitted, 7 packet received, 30% loss
    I tried installing an Ethernet card into expansion slot,
    absolutely No Response ( blank read-outs) in System Prefs > Networks < TCP/IP
    • Encore Electronics ( $ 20.00 returnable )
    • ENL832-TX-EN
    • 10/100 Fast Ethertnet Network Adapte

  • MacBook Pro internet connection failure.

    I have a 13" MacBook Pro with Lion and I connect it to Internet through WiFi. But in order to watch contents on a bigger screen I use to connect it to the TV as well via MiniDisplay Port-HDMI. But as soon as I connect it to the TV, the Internet connection is disrupted. If I disconnect it from the TV´s HDMI, the internet connection works as normally. What can be the cause?

    Hi there jse1026,
    You may find the troubleshooting steps in the article below helpful.
    Wi-Fi: How to troubleshoot Wi-Fi connectivity
    -Griff W. 

  • Another internet connection failure

    I have an iMac G5, Macbook, and PC Laptop hooked up to an Airport Express Base Station. I will suddenly lose internet connection (not network connection) with the iMac while the Macbook and PC run fine. If I turn off the G5's airport card and turn it back on, it internet will start running again, but only for a minute or two. I have seen many posts on here with the exact same problem, but have yet to see a solution. Is there some type of buffer that is getting full? I can't figure out why resetting the G5's airport will only fix it for a few minutes.

    You would do better re-posting over in the AirPort Express Forums where the Airport users hang out.

  • IPad internet connectivity failure

    I was sailing along with my 40-hour-old iPad2, getting all the apps in the right folders, setting up and using email accounts, having a wonderful time surfing the web. And then, Wham! My brand-spanking-new 32GB White Wi-Fi model decided it didn't like the Internet and refused to join the rest of the civilized world.
    After talking to an Apple rep, quitting the home network and rejoining it a couple of times, doing a complete Restore (there goes all those hours spent moving apps into folders and getting the settings for sounds, etc., almost right) twice. Nothing.
    I've got an appointment at the Indianapolis Apple Store tomorrow afternoon. If that minor problem cannot fixed by the good folks at Keystone, where the connectivity issue did not raise its head while there Friday on a couple of other issues (did you know your Touch, and possibly your iPad, can have slooooow issues if you leave apps running in the latest version of iOS? By double tapping the home button and holding down an app icon at the bottom, the jiggles begin, the minus sign pops up and you can immediately close all those little guys making the Touch run slowly). But then, last evening ...
    Is it possible someone in this community has found a similar problem and has found a solution?

    I was sailing along with my 40-hour-old iPad2, getting all the apps in the right folders, setting up and using email accounts, having a wonderful time surfing the web. And then, Wham! My brand-spanking-new 32GB White Wi-Fi model decided it didn't like the Internet and refused to join the rest of the civilized world.
    After talking to an Apple rep, quitting the home network and rejoining it a couple of times, doing a complete Restore (there goes all those hours spent moving apps into folders and getting the settings for sounds, etc., almost right) twice. Nothing.
    I've got an appointment at the Indianapolis Apple Store tomorrow afternoon. If that minor problem cannot fixed by the good folks at Keystone, where the connectivity issue did not raise its head while there Friday on a couple of other issues (did you know your Touch, and possibly your iPad, can have slooooow issues if you leave apps running in the latest version of iOS? By double tapping the home button and holding down an app icon at the bottom, the jiggles begin, the minus sign pops up and you can immediately close all those little guys making the Touch run slowly). But then, last evening ...
    Is it possible someone in this community has found a similar problem and has found a solution?

  • Internet connectivity failure

    We are using a TC as a Wi-Fi to access internet. Around 12 people are connected to it, but some of them -some times only- don't have access to internet, although they have local access. What could be happening?

    Ok.. I woud do a few things..
    First of all, load 5.6 utility into a computer.. any windows computer.. easy.. any Mac up to lion.. easy.. and Mountain Lion is a bit hard but can be done.
    Only 5.6 utility has access to the log and access to the wireless client graphs. v6 is useless.
    See below for how to install 5.6 if you only have ML
    I recommend a new clean setup of the TC..
    where you change all names to SMB compatible.. this is important for non-apple devices.. and will help iOS as well.
    Short names.. less than 20 characters.. no spaces.. pure alphanumeric.
    Give a different name to 5ghz. This is important because it will allow you to control the load.. some devices can only use 2.4ghz but some will do either band.. if you force some of the load to 5.6 it will work better.
    Time Capsule works on both bands.. but by default, almost nothing joins 5ghz unless you force it.
    WPA2 Personal security only.. Use a 10-20 character password.. pure alphanumeric.
    Now the most important part.
    Use manual radio channels.. fix it yourself to what works best.. for 2.4ghz try in order.. 11, 6. 1
    and for 5ghz try any of the low channels.. 36-40.
    So the setup looks like this. (in 5.6 utility of course).
    Your country will of course be different.
    Then you can see the wireless log info.
    I would also make sure that the dhcp server is set to a fairly short lease time to ensure you don't run out.
    Since the TC is bridged you would do that on the main router.
    How to load 5.6 into ML.
    1. Download 5.6 for Lion.
    http://support.apple.com/kb/DL1482
    Click to open the dmg but do not attempt to install the pkg.. it won't work anyway.
    2. Download and install unpkg.
    http://www.timdoug.com/unpkg/
    Run unpkg on the desktop.. it is very simple.. drag the AirPortUtility56.pkg file over to unpkg.. and it will create a new directory of the same name on the desktop.. drill down.. applications utilities .. there lo and behold is Airport utility 5.6 .. drag it to your main utilities directory or just run it from current location.
    You cannot uninstall 6.1 (now 6.2 if you updated) so don't try.. and you cannot or should not run them both at the same time.. so just ignore the toyland version.. the plastic hammer.. and start using 5.6.. a real tool.
    For screen shots see this post.
    https://discussions.apple.com/thread/4668746?tstart=0

  • INTERNET CONNECTION NOT DETECTED message with Crystal Reports 2011

    Hello:
         We upgrade from SQL 3008 R2 to SQL 2012 SP1.   Had trouble with Crystal Reports not opening reports.  Information on the internet indicated that you had to reinstall Crystal Reports after upgrading SQL.  We did a repair of Crystal Reports 2011.  I have the box checked to check for updates when Crystal Reports starts.  I am now getting INTERNET CONNECTION NOT DETECTED and the application will not check for updates.  We have tried turning of the firewall and almost everything else we can think of.  I have access to the internet from that server and IE9 works just fine.  Can anyone help, please.
    Thank You,
    Jack G.

    Hello Jack,
    This one helps: INTERNET CONNECTION NOT DETECTED
    Internet Connection failure
    --Dhana

  • I'm unable to login to facebook though I reinstalled twice, but as i try to login it gives an error message as timeout, connection failure or check internet connection.

    Dear service provider, I'm unable to login to facebook even though i tried to uninstall and again reinstall as per the observation from the forum discussion.. but still it gives me arror as Timeout connection, or connection failure and check internet connection.. how to troubleshoot, pls suggest me..
    2ndly I'm unable to search by some of the keywords in itunes. means iTune is not fetching the required information rather it gives no result found message..

    Have you tried a hard reset of the iPod to see if that helps?  To do this, press and hold both the Sleep/Wake and Home buttons together long enough for the Apple logo to appear. 
    Otherwise, work through each of the troubleshooting suggestions in this Apple support document as necessary.
    iOS: Troubleshooting Wi-Fi networks and connections
    B-rock

  • Following hard drive failure on iMac running Maverick I have recovered from TimeMachine backup but now app store does not connect. All other internet connections normal. Does anyone know of a fix?

    following hard drive failure on iMac running Maverick I have recovered from TimeMachine backup but now app store does not connect. All other internet connections normal. Does anyone know of a fix?
    Also mail not loading. The error report suggests that I look for updates from the app store?

    http://www.apple.com/support/mac/app-store/contact/

  • Software activation Premiere elements: error 1: internet connection not recognized - error 2: failure: "Der eingegebene Antwortcode ist ungültig. Geben Sie ihn erneut ein." This I did for several times. I generated a new "Antwortcode", but the system gave

    computer: Lenovo ideapad Z710
    OS: Windows 8.1
    program: Premiere Elements 12.1

    Dear Mylenium,
    my problem is:
    Adobe programs do not recognize an established and working internect connection.
    So I used the same computer to get with the given request code ("Anforderungscode") an answer code ("Antwortcode"). But Premiere Elements does not recognize this answer code and tells me, that this answer code is invalid ("ungültig"). So what should I do ?
    Everytime I try to repeat this, I get the same request code and the same answer code. Should I wait until the 72h time limit is over to get than a new answer code ?
    Anyway, why does Premiere Elements (like Photoshop Elements, too) does not recognize the established internet connection, but is able to recognize that there is for instance an update available ?
    Thanks for help.
    HTJ3BA

  • Problems with your internet connection after upgrading to iOS 7.1.2

    After upgrading to iOS 7.1.2 on my iPad Retina display does not connect to the internet more. Recognizes the Wi-Fi network but can not connect to the internet. The same thing happened to my wife's iPhone 5s, while my had no problems ...

    Some things to try first:
    1. Turn Off your iPad. Then turn Off (disconnect power cord for 30 seconds or longer) the wireless router & then back On. Now boot your iPad. Hopefully it will see the WiFi.
    2. Go to Settings>Wi-Fi and turn Off. Then while at Settings>Wi-Fi, turn back On and chose a Network.
    3. Change the channel on your wireless router (Auto or Channel 6 is best). Instructions at
    http://macintoshhowto.com/advanced/how-to-get-a-good-range-on-your-wireless-netw ork.html
    4. Go into your router security settings and change from WEP to WPA with AES.
    5.  Renew IP Address: (especially if you are drooping internet connection)
        •    Launch Settings app
        •    Tap on Wi-Fi
        •    Tap on the blue arrow of the Wi-Fi network that you connect to from the list
        •    In the window that opens, tap on the Renew Lease button
    6. Potential Quick Fixes When Your iPad Won’t Connect to Your Wifi Network
    http://ipadinsight.com/ipad-tips-tricks/potential-quick-fixes-when-your-ipad-won t-connect-to-your-wifi-network/
    ~~~~~~~~~~~~~~~~~~~~~~~~~
    Fix WiFi Issue for iOS 7
    http://ipadnerds.com/fix-wifi-issue-ios-7/
    iOS 6 Wifi Problems/Fixes
    Wi-Fi Fix for iOS 6
    https://discussions.apple.com/thread/4823738?tstart=240
    How To: Workaround iPad Wi-Fi Issues
    http://www.theipadfan.com/workaround-ipad-wifi-issues/
    Another Fix For iOS 6 WiFi Problems
    http://tabletcrunch.com/2012/10/27/fix-ios-6-wifi-problems-ssid/
    Wifi Doesn't Connect After Waking From Sleep - Sometimes increasing screen brightness prevents the failure to reconnect after waking from sleep. According to Apple, “If brightness is at lowest level, increase it by moving the slider to the right and set auto brightness to off.”
    Fix For iOS 6 WiFi Problems?
    http://tabletcrunch.com/2012/09/27/fix-ios-6-wifi-problems/
    Did iOS 6 Screw Your Wi-Fi? Here’s How to Fix It
    http://gizmodo.com/5944761/does-ios-6-have-a-wi+fi-bug
    How To Fix Wi-Fi Connectivity Issue After Upgrading To iOS 6
    http://www.iphonehacks.com/2012/09/fix-wi-fi-connectivity-issue-after-upgrading- to-ios-6.html
    iOS 6 iPad 3 wi-fi "connection fix" for netgear router
    http://www.youtube.com/watch?v=XsWS4ha-dn0
    Apple's iOS 6 Wi-Fi problems
    http://www.zdnet.com/apples-ios-6-wi-fi-problems-linger-on-7000004799/
    ~~~~~~~~~~~~~~~~~~~~~~~
    iPad: Issues connecting to Wi-Fi networks
    http://support.apple.com/kb/ts3304
    How to Boost Your Wi-Fi Signal
    http://ipad.about.com/od/iPad_Troubleshooting/a/How-To-Boost-Your-Wi-Fi-Signal.hmL
    Troubleshooting a Weak Wi-Fi Signal
    http://ipad.about.com/od/iPad_Troubleshooting/a/Troubleshooting-A-Weak-Wi-Fi-Signal.htm
    How to Fix a Poor Wi-Fi Signal on Your iPad
    http://ipad.about.com/od/iPad_Troubleshooting/a/How-To-Fix-A-Poor-Wi-Fi-Signal-O n-Your-iPad.htm
    iOS Troubleshooting Wi-Fi networks and connections  http://support.apple.com/kb/TS1398
    iPad: Issues connecting to Wi-Fi networks  http://support.apple.com/kb/ts3304
    WiFi Connecting/Troubleshooting http://www.apple.com/support/ipad/wifi/
    How to Fix: My iPad Won't Connect to WiFi
    http://ipad.about.com/od/iPad_Troubleshooting/ss/How-To-Fix-My-Ipad-Wont-Connect -To-Wi-Fi.htm
    iOS: Connecting to the Internet http://support.apple.com/kb/HT1695
    iOS: Recommended settings for Wi-Fi routers and access points  http://support.apple.com/kb/HT4199
    How to Quickly Fix iPad 3 Wi-Fi Reception Problems
    http://osxdaily.com/2012/03/21/fix-new-ipad-3-wi-fi-reception-problems/
    iPad Wi-Fi Problems: Comprehensive List of Fixes
    http://appletoolbox.com/2010/04/ipad-wi-fi-problems-comprehensive-list-of-fixes/
    Connect iPad to Wi-Fi (with troubleshooting info)
    http://thehowto.wikidot.com/wifi-connect-ipad
    10 Ways to Boost Your Wireless Signal
    http://www.pcmag.com/article2/0,2817,2372811,00.asp
    Fix iPad Wifi Connection and Signal Issues  http://www.youtube.com/watch?v=uwWtIG5jUxE
    Fix Slow WiFi Issue https://discussions.apple.com/thread/2398063?start=60&tstart=0
    How To Fix iPhone, iPad, iPod Touch Wi-Fi Connectivity Issue http://tinyurl.com/7nvxbmz
    Unable to Connect After iOS Update - saw this solution on another post.
    https://discussions.apple.com/thread/4010130
    Note - When troubleshooting wifi connection problems, don't hold your iPad by hand. There have been a few reports that holding the iPad by hand, seems to attenuate the wifi signal.
    Some Wi-Fi losses may stem from a problematic interaction between Wi-Fi and cellular data connections. Numerous users have found that turning off Cellular Data in Settings gets their Wi-Fi working again.
    You may have many apps open which can possibly cause the slowdown and possibly the loss of wifi. In iOS 4-6 double tap your Home button & at the bottom of the screen you will see the icons of all open apps. Close those you are not using by pressing on an icon until all icons wiggle - then tap the minus sign. For iOS 7 users, there’s an easy way to see which apps are open in order to close them. By double-tapping the home button on your iPhone or iPad, the new multitasking feature in iOS 7 shows full page previews of all your open apps. Simply scroll horizontally to see all your apps, and close the apps with a simple flick towards the top of the screen.
    Wi-Fi or Bluetooth settings grayed out or dim
    http://support.apple.com/kb/TS1559
    ~~~~~~~~~~~~~~~
    If any of the above solutions work, please post back what solved your problem. It will help others with the same problem.
     Cheers, Tom

  • My 2007 mac pro has a slow internet connection with lion

    Hi:
    I've been dealing with a severely slow internet connection with my 2007 mac pro - dual quad core.  I have os 10.7.3.  I use wifi. 
    Typically, I'll experience difficulty loading websites completely.  Certain sites have a 90% failure rate to load most elements.  Other sites operate quickly from time to time.  Often, a site will simply fail to load at all.  My cable company cannot find anything wrong with my connection and other, newer devices don't have a problem loading sites.  It seems the issue is most likely related to my computer.
    Interestingly, I can usually "jump-start" the connection by turning my wifi connection off and on and this will (temporarily) allow me to get an image or video to download.
    Any ideas?
    Thank you for your time.

    Hi:
    I've been dealing with a severely slow internet connection with my 2007 mac pro - dual quad core.  I have os 10.7.3.  I use wifi. 
    Typically, I'll experience difficulty loading websites completely.  Certain sites have a 90% failure rate to load most elements.  Other sites operate quickly from time to time.  Often, a site will simply fail to load at all.  My cable company cannot find anything wrong with my connection and other, newer devices don't have a problem loading sites.  It seems the issue is most likely related to my computer.
    Interestingly, I can usually "jump-start" the connection by turning my wifi connection off and on and this will (temporarily) allow me to get an image or video to download.
    Any ideas?
    Thank you for your time.

  • WiFi: No Internet Connection Issue

    Please Help!!!
    MacBook Pro 13 inch i5-processor, 4G memory, Late 2011 edition running Lion 10.7.3
    I finally made the switch from PC to Mac... after I had way too many PC failures. Several told me that they have not experienced such frequent failures on Apple products.
    However, I am very frustrated and second guessing whether I made the right choice... so asking someone to help.
    I bought a MacBook Pro 2 weeks ago that worked great for a few days. Then the internet slowed down. I thought it would be my router. I checked out the connectiviy at other locations where the speeds were great (commercial locations). On a PC the connection was good but on my Mac it was slow. So checked out for an update. There was one, applied that and there was an improvement. But found out that if I put the Mac to sleep and do not shutdown the spped degrades over time. Well, for some reason a couple of days later the speeds 'took care of itself' !!!
    Now I have a new problem for the past 4 days... that has limited me in my day-to-day work.
    WiFi connects and finds the signal and connects but do not have any internet connection. Gives me an error "No Internet Connection". This is what I have done so far...
    1) Connect a wired connection... internet is fine.
    2) Took it to Geek Squad (Best Buy) they ran a command "sudo ifconfig..." fixed it and gave me the same commands to try next time. However, that does not work at all since then
    3) Ran Network Diagnostics... no help
    4) Turned WiFi Off and On along with Forgetting this Networks and Joining again. Done this with several combinations and multiple times... no dice
    5) There was a recent update and applied that ... no help
    I am close to giving up on a Mac altogether... please help...

    Can someone please at least acknowledge if they are or have experienced this same problem?

  • Mail Connection Failures And EWS (Exchange Web Service) Errors

    Hi,
    I upgraded from Leopard to Snow Leopard on Friday, and was able to set up my Mail, iCal, and Address Book very quickly and easily. Everything has been working great until today, when I experienced an issue with emails with attachments. The company I work for uses Exchange 2007 hosted on Rackspace.
    When sending an email with attachments, I sporadically receive a connection error. This is the same error that I usually get if a server goes offline or I lose my Internet connection - the one where you get the choice to either try again, send later, or use another server to send the email. I will receive this error over and over, and can then send an email with attachments a few minutes later without issue, so it is definitely a sporadic problem. I have not had this issue with emails that did not contain attachments. On at least one occasion, an email with attachments was delivered to the recipient successfully but failed to show up in my Sent Items either in Mail or on the Exchange Server's web mail client.
    Rackspace was unable to diagnose the issue, but they have had several reports of the same problem. I looked in the console and saw several errors logged by Mail, all which appeared to happen around the same times that I had the connection failures for the messages with attachments.
    8/31/09 1:17:00 PM Mail[1764] Error (null) occurred while trying to append messages to outgoing store. Ignoring and proceeding with delivery...
    8/31/09 1:57:06 PM Mail[1764] Error (null) occurred while trying to append messages to outgoing store. Ignoring and proceeding with delivery...
    8/31/09 2:32:14 PM Mail[1764] Error Error Domain=MFEWSErrorDomain Code=56 UserInfo=0x1179aa6f0 "The operation couldn’t be completed. (MFEWSErrorDomain error 56.)" occurred while trying to append messages to outgoing store. Ignoring and proceeding with delivery...
    8/31/09 2:44:21 PM Mail[1764] Error Error Domain=MFEWSErrorDomain Code=56 UserInfo=0x116c0aa40 "The operation couldn’t be completed. (MFEWSErrorDomain error 56.)" occurred while trying to append messages to outgoing store. Ignoring and proceeding with delivery...
    8/31/09 3:19:59 PM Mail[4279] * Assertion failure in -[ComposeBackEnd setAccount:], /SourceCache/Mail/Mail-1075/Compose.subproj/ComposeBackEnd.m:1522
    ComposeBackEnd does not support explicitly setting an account
    0 Message 0x00007fff876aa880 -[MFAssertionHandler _handleFailureWithPreamble:description:arguments:] + 137
    1 Message 0x00007fff876aa7e5 -[MFAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 220
    2 Mail 0x00000001001442ec 0x0 + 4296295148
    3 Foundation 0x00007fff86ab9722 _NSSetObjectValueAndNotify + 258
    4 Mail 0x00000001001428da 0x0 + 4296288474
    5 CoreFoundation 0x00007fff87aae35c _invoking__ + 140
    6 CoreFoundation 0x00007fff87aae22d -[NSInvocation invoke] + 141
    7 Message 0x00007fff874ee0aa -[ThrowingInvocationOperation main] + 31
    8 Message 0x00007fff874ed9ea -[_MFInvocationOperation main] + 275
    9 Foundation 0x00007fff86ac611a -[__NSOperationInternal start] + 673
    10 Foundation 0x00007fff86ac5dd8 ___startOperations_block_invoke2 + 99
    11 libSystem.B.dylib 0x00007fff82515dc7 dispatch_call_block_andrelease + 15
    12 libSystem.B.dylib 0x00007fff824f4341 dispatch_workerthread2 + 231
    13 libSystem.B.dylib 0x00007fff824f3c80 pthreadwqthread + 353
    14 libSystem.B.dylib 0x00007fff824f3b1d start_wqthread + 13
    8/31/09 3:20:36 PM Mail[4279] * Assertion failure in -[ComposeBackEnd setAccount:], /SourceCache/Mail/Mail-1075/Compose.subproj/ComposeBackEnd.m:1522
    ComposeBackEnd does not support explicitly setting an account
    0 Message 0x00007fff876aa880 -[MFAssertionHandler _handleFailureWithPreamble:description:arguments:] + 137
    1 Message 0x00007fff876aa7e5 -[MFAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 220
    2 Mail 0x00000001001442ec 0x0 + 4296295148
    3 Foundation 0x00007fff86ab9722 _NSSetObjectValueAndNotify + 258
    4 Mail 0x00000001001428da 0x0 + 4296288474
    5 CoreFoundation 0x00007fff87aae35c _invoking__ + 140
    6 CoreFoundation 0x00007fff87aae22d -[NSInvocation invoke] + 141
    7 Message 0x00007fff874ee0aa -[ThrowingInvocationOperation main] + 31
    8 Message 0x00007fff874ed9ea -[_MFInvocationOperation main] + 275
    9 Foundation 0x00007fff86ac611a -[__NSOperationInternal start] + 673
    10 Foundation 0x00007fff86ac5dd8 ___startOperations_block_invoke2 + 99
    11 libSystem.B.dylib 0x00007fff82515dc7 dispatch_call_block_andrelease + 15
    12 libSystem.B.dylib 0x00007fff824f4341 dispatch_workerthread2 + 231
    13 libSystem.B.dylib 0x00007fff824f3c80 pthreadwqthread + 353
    14 libSystem.B.dylib 0x00007fff824f3b1d start_wqthread + 13
    8/31/09 3:49:26 PM Mail[4279] * Assertion failure in -[EWSDelivery deliverSynchronously], /SourceCache/Message/Message-1075.2/Delivery.subproj/EWSDelivery.m:84
    EWSDelivery doesn't have an EWSAccount, got (null) instead
    0 Message 0x00007fff876aa880 -[MFAssertionHandler _handleFailureWithPreamble:description:arguments:] + 137
    1 Message 0x00007fff876aa7e5 -[MFAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 220
    2 Message 0x00007fff875f51e9 -[EWSDelivery deliverSynchronously] + 861
    3 Mail 0x000000010007d120 0x0 + 4295479584
    4 Mail 0x000000010007cc38 0x0 + 4295478328
    5 CoreFoundation 0x00007fff87aae35c _invoking__ + 140
    6 CoreFoundation 0x00007fff87aae22d -[NSInvocation invoke] + 141
    7 Message 0x00007fff87506b51 -[MonitoredInvocation invoke] + 214
    8 Message 0x00007fff874ee0aa -[ThrowingInvocationOperation main] + 31
    9 Message 0x00007fff874ed9ea -[_MFInvocationOperation main] + 275
    10 Foundation 0x00007fff86ac611a -[__NSOperationInternal start] + 673
    11 Foundation 0x00007fff86ac5dd8 ___startOperations_block_invoke2 + 99
    12 libSystem.B.dylib 0x00007fff82515dc7 dispatch_call_block_andrelease + 15
    13 libSystem.B.dylib 0x00007fff824f4341 dispatch_workerthread2 + 231
    14 libSystem.B.dylib 0x00007fff824f3c80 pthreadwqthread + 353
    15 libSystem.B.dylib 0x00007fff824f3b1d start_wqthread + 13
    8/31/09 4:00:06 PM Mail[4279] * Assertion failure in -[ComposeBackEnd setAccount:], /SourceCache/Mail/Mail-1075/Compose.subproj/ComposeBackEnd.m:1522
    ComposeBackEnd does not support explicitly setting an account
    0 Message 0x00007fff876aa880 -[MFAssertionHandler _handleFailureWithPreamble:description:arguments:] + 137
    1 Message 0x00007fff876aa7e5 -[MFAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 220
    2 Mail 0x00000001001442ec 0x0 + 4296295148
    3 Foundation 0x00007fff86ab9722 _NSSetObjectValueAndNotify + 258
    4 Mail 0x00000001001428da 0x0 + 4296288474
    5 CoreFoundation 0x00007fff87aae35c _invoking__ + 140
    6 CoreFoundation 0x00007fff87aae22d -[NSInvocation invoke] + 141
    7 Message 0x00007fff874ee0aa -[ThrowingInvocationOperation main] + 31
    8 Message 0x00007fff874ed9ea -[_MFInvocationOperation main] + 275
    9 Foundation 0x00007fff86ac611a -[__NSOperationInternal start] + 673
    10 Foundation 0x00007fff86ac5dd8 ___startOperations_block_invoke2 + 99
    11 libSystem.B.dylib 0x00007fff82515dc7 dispatch_call_block_andrelease + 15
    12 libSystem.B.dylib 0x00007fff824f4341 dispatch_workerthread2 + 231
    13 libSystem.B.dylib 0x00007fff824f3c80 pthreadwqthread + 353
    14 libSystem.B.dylib 0x00007fff824f3b1d start_wqthread + 13
    Just wanted to report this issue in case this is something that other people are experiencing, and to see if Apple's engineers could look in to it. There is a simple workaround, which is to set up a regular SMTP server as the outgoing mail server for the Exchange account, and to use this instead of the outgoing Exchange server set up by Snow Leopard.
    Thanks,
    - max

    Hi MangeshDD,
    Some other information for you:
    Understanding Exchange Web Services Virtual Directories
    If you still have other confused points, please feel free let us know.
    Regards!
    Gavin
    TechNet Community Support

Maybe you are looking for