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outlook is prompt for user name and password

We have migrated our exchange server 2003 to exchange server 2010. Now all is working well but we have one issue with the outlook client for a couple of users.

We have a couple of users who leave Outlook running during the night. We shut down the Exchange server during the night for backup.  When these users look at Outlook in the morning, they are prompted for logon credentials in Outlook.  Sometimes entering their username and password fixes the problem, other times they must restart Outlook to fix it. After that, Outlook runs fine until the next time the e-mail server is restarted.

Kindly suggest...
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rigelnet
Asked:
rigelnet
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1 Solution
 
Simon Butler (Sembee)ConsultantCommented:
"We shut down the Exchange server during the night for backup"

Why are you doing that?
Exchange isn't designed to be backed up in that way. Exchange is designed to be running 24x7 and backed up using an Exchange aware backup application.

Otherwise that is what happens to Outlook when Exchange goes away. It looses the connection and presumes it is an authentication issue.
The only way to stop it is to not shut down Exchange.

Simon.
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rigelnetAuthor Commented:
We are doing the same before migration in exchange 2003 and at that time we did not get this issue. It is because of exchange server 2010 ?

We need to shut down because we are coping EDB files into another location.

Kindly suggest...
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Simon Butler (Sembee)ConsultantCommented:
The fact that you were doing it with Exchange 2003 doesn't mean it was the right thing to do. Copying the files to another location is not a valid backup and you can actually damage the database by constantly shutting it down. You should use an Exchange aware backup to backup the Exchange database. Due to the nature of Exchange, your "backup" is out of date immediately after taking a copy and as you aren't doing an Exchange aware backup, doing a restore is going to be more complicated.

The solution is to backup Exchange as it was designed to, and that is via an Exchange aware application.

Simon.
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rigelnetAuthor Commented:
We have our exchange in a VM. Can you send a link or reference for the exchange online backup. We will prefer backup option like windows backup and more.

Because we sort the backup issue we do not need to shut down exchange and outlook username and password pop issue will be solved. Right??

Kindly suggest..
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Simon Butler (Sembee)ConsultantCommented:
You can use Windows Backup if you wish, or something like Backup Assist (the basic product is all that you need - no other options). If you do a backup as per the instructions, selecting Exchange than it will not require Exchange to be shutdown.

If you really want to use Windows Backup:
http://technet.microsoft.com/en-us/library/dd876854(v=exchg.150).aspx

Personally I find it too limiting, particularly on destinations and media handling. Backup Assist uses the same native agents. http://www.backupassist.com/ 

An Exchange aware backup will stop the clients from being disconnected.

Simon.
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