hello,one of our users mailboxes was deleted completely from disk. more specifically, the lun on the SAN was completely wiped out. i recreated the lun, recreated the logical drives on the exchange server, then recreated the storage group. next, i went through recovery storagae process and then restored the .edb + logs to the recovery storage group. i then recreated the user in exchange on a different storage group. i then restored all the mail / calendar / etc to the new mailbox location. everything seemed peechy keen. until the next day the user reported that a lot of users (all internal) were receiving ndrs when trying to send mail. today this is still happening intermittinly and now i received notice that a client could not send mail to the user. when i double click the user in the from field from one of the emails that was returned ndr and then goto the email address of the problematic user there are no emails listed. its completely blank. any insight would be greatly appreciated.

Hi, What do u mean to say that there are no emails listed? Are there no email addresses assigned to this user? Can u tell whether "Update Email addresses based on the Email Address policy" is selected for this user? The mailbox must have atleast one email address. Try to set the above said flag or You can also manually add email addresses to this mailbox. Email sending failure can also be due to the change of "LegacyExchangeDN" attribute of the mailbox. This normally happens when emails are replied to the problematic user (who sent emails earlier). Regards,Laeeq Qazi|Team Lead(Exchange + Sharepoint + BES + DynamicsCRM) www.HostingController.com

thanks for the reply ! "update email address based on the email address policy" isn't selected, however, i do have a few email addresses that I entered manually. what i mean to say about there not being any emails listed is that if i find a message in one of the senders sent items folder and open it up. i double click the problematic recepient to view the properties of the user. i click the email addresses tab and it is blank. no email address are listed.

Hi, Try one thing. Update your address lists if you have some specific Address Lists for the problematic mailbox. You can also update all address list if u are not sure about some specific. After update download address lists using Outlook->Send and Recieve and then check it. For updating a specific Address List use following PowerShell command in EMS Update-AddressList yourAL OR For All Get-AddressList | Update-AddressList For updating a specific Global Address List use Update-GlobalAddressList your GlobalAL OR For All Get-GlobalAddressList | Update-GlobalAddressList For offline Address book Update and Distribution see this link http://ExchangeGeek.WordPress.com Hope this helps u. Regards, Laeeq Qazi|Team Lead(Exchange + Sharepoint + BES + DynamicsCRM) www.HostingController.com

just updated address list + global catalog on my exchange server. is there anything else i need to do on the client side ?

You could try getting the users to either remove their *.nk2 files which will remove all autocomplete addresses, or they can just remove the one address as Outlook may still be trying to use cached data that is now invalid. Take a look at at this link as it explains how to do both methods.My blog: http://www.monkeydust.net | Twitter: http://www.twitter.com/MrYiff

thank you for the response, i appreciate it. ya if i remove the address from the nk2 file it appears to resolve the issue. what i dont understand is ... the address hasn't changed so why does the email fail to be delivered ? the only thing that has changed is that the users mailbox is now on a different storage group. also having to touch each workstation that has the invalid address is pretty cumbersome. and im not so sure that my user would be satisfied with this as a solution. lastly, if external senders are using the autocomplete address would that affect mail delivery ??

I've seen this sort of thing quite a lot in my previous job working for an Exchange hosting provider and it always seemed to be limited to internal users (or rather, I dont recall any reports of external users having similar issues), my guess is that Outlook caches more than just the email address (maybe the uid or something similar), so when the user is deleted and recreated they still have the same email address but obviously the uid has changed. Maybe someone else can provide a more detailed technical explanation (I've never found one above just being told to delete the nk2 file or the cached entry), but then again I never had time to look, the fact that it worked was enough! :)My blog: http://www.monkeydust.net | Twitter: http://www.twitter.com/MrYiff

nick, thanks again for the response. i appreciate the insight and recommendations.

Hi,Whether the recreated user has the same LegacyExchangeDN as the original deleted user?ThanksAllen