: Recipient address rejected: User unknown
in virtual alias table.
Solution: You have too many SMTP addresses on this account.
The virtual users table script only allows 2 @oregonstate.edu addresses.
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Open Additional Mailbox
As the Exchange administrator for your group, you have permissions
to open all mailboxes in your Exchange store. This can be very useful
for troubleshooting and diagnosing problems with mailboxes that are over
quota, finding missing messages, recovering deleted items, etc. You do NOT
need to know the user's password to open their mailbox. In general, it is not
a good idea to ask a user for their password.
Note: Opening a user's mailbox should only be done with the person's knowledge
or at direction from the dean or department head.
MAPI (Outlook client)
To open another user's mailbox, the easiest way is to add it to your Outlook profile:
In the folder list on the left, right-click on the top level of your Mailbox.
Choose Properties.
Click the Advanced button.
Select the Advanced tab.
Click Add and enter the person's name or mailbox alias.
Click OK twice.
You will see the secondary mailbox added to your profile under the Folder List on the left. To remove it, go through the
same steps above, but choose Remove instead of Add.
Alternatively, you can create a new Outlook profile on your computer for the user, and simply run
Outlook with that profile set as primary. (Or, configure Outlook to prompt for
a profile to use.)
Outlook Web Access
To open another user's mailbox in Outlook Web Access, first login as you
would normally. After logging into OWA, add the prefix of the person's
@oregonstate.edu email address to the URL and hit enter. For example, to
open the mailbox for a user who's email address is
Bart.Simpson@oregonstate.edu, type the following into the URL after
logging into Outlook Web Access:
https://exmail.oregonstate.edu/exchange/Bart.Simpson
To re-open your own mailbox, simply clear the other person's name from the URL
and hit enter again.
lisa.simpson@oregonstate.edu
POP/IMAP
You can also use a POP or IMAP client to open another user's mailbox.
Configure the mail client as you would normally (POP/IMAP instructions). For the username, enter
your domain\username, and your password, and add the other person's mailbox
alias, UPN, or pre-windows 2000-style login, like this:
username: domain\username\alias
or
username: domain\username\UPN
or
username: domain\username\login_name
The pre-windows 2000-style login and the User Principal Name (UPN) can be
found on the Account tab in Active Directory. The pre-windows2000 login name
is not required to be unique, so you may have trouble using it. The UPN
is required to be unique, so you may be better off using that.
In our AD forest, most Exchange users will have a UPN that matches their
@oregonstate.edu e-mail address.
The "alias" in the example above refers to the Exchange mailbox alias
of the other user. You can find this attribute on the Exchange General
tab in AD Users & Computers. It is also not required to be unique in
the forest, so it could be problematic to use.
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View Mailbox Size
There are two ways to check the size of a mailbox.
The first method is to add the user's mailbox to your profile in the Outlook client (in MAPI mode), then right-click on the mailbox under the Folder List
and choose Properties, Folder Size. The Folder Size button will show you the total size of the mailbox, as well as the size
per folder.
The other method is to use Exchange System Manager:
- Click on Start - Programs - Microsoft Exchange - System Manager
- Once in the utility, expand the following:
- Administrative Groups
- Central Email Services
- Servers
- Servername
- Storage Group
- Mailbox Store
- Click on Mailboxes.
- On the right, you will see a list of all the mailboxes in your store with size, number of items and last login time.
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Change an Account Name
To change a person's name in Active Directory, do the following:
- In Active Directory Users & Computers, right-click on the user object and choose Rename.
- Type in the new name for the user object and hit Enter.
- A "Rename User" window will pop-up. From here, update the Full Name, First and Last Name,
Display Name, logon name, and pre-Windows 2000 logon name, as needed. Click OK.
- Right-click on the user object again and choose Properties. Select the Exchange General tab. From here you can update the Exchange alias. It's generally a good idea to make it match the pre-windows 2000 logon name.
- Choose the Email addresses tab. You can either replace the current @oregonstate.edu address with the new one, or add a new email address to reflect the person's new name. Objects are allowed to have up to 2 email aliases total (aliases are addresses that end in @oregonstate.edu). Once people have learned the new email address, you can remove the old one.
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Update SMTP address
If you have recieved an error similar to:
"An Exchange Server could not be found in the domain.
Check if the Microsoft system Attendent services is running on the Exchange Server.
ID no. c10308a2
Microsoft Active directory - Exchange Extension"
Then you'll need to follow this procedure to get administrative access.
To change a person's SMTP address in Active Directory, follow these steps:
- Contact itconsult, give us the ip of your workstation (cannot be in a dynamic range)
- Network Engineering will grant access to this ip address (this is to minimize our servers' exposure)
- In Active Directory Users & Computers, double click on the user object, navigate to 'E-mail Addresses' tab
- Select the SMTP (all capitals); this is the primary SMTP address. click Edit
- Format the email address and click OK
- It could take up to an hour for the new address to change
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Reconnect a Deleted Mailbox
When you delete an account in AD, the associated mailbox is always deleted - this is by design.
However, we retain deleted mailboxes on the system for 90 days before they are completely purged.
In that time, you can reconnect a deleted mailbox to another account. The account that you reconnect
to must not already have a mailbox associated with it.
NOTE: When a mailbox is deleted, the SMTP addresses are lost and will need to be added back when you reconnect the mailbox. Permissions set on the mailbox are maintained.
To reconnect a mailbox, you need to use the Exchange System Manager tool. Here is the procedure:
- Open System Manager. Click on Start, Programs, Microsoft Exchange, System Manager.
- Browse to Administrative Groups, Central Email Services, Servers, Servername, Storage Group, Store.
- Click on Mailboxes.
- On the right, look for the deleted mailbox - it will have a red X next to it.
- Right-click the deleted mailbox and choose Reconnect.
- Find the account to associate the mailbox with and choose OK.
- You may see a warning pop up about replication - just click OK.
- Once the e-mail attributes have replicated to the new user object, add the SMTP addresses back.
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Adjust Mailbox/Account Affiliation
In order to associate a mailbox with a different account, you have to "delete" the mailbox.
The mailbox will be diconnected from the account and can then be reconnected to another account
that does not already have a mailbox.
To disconnect the mailbox, right-click on the account in AD Users & Computers and choose Exchange
Tasks. Then, choose the option to "Delete Mailbox" and follow the prompts.
To reconnect the mailbox to a different account, follow the steps listed above.
NOTE: When a mailbox is deleted, the SMTP addresses are lost and will need to be added back when you reconnect the mailbox.
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Disable an Exchange user
Before disabling an Exchange user in Active Directory, you need to set the "associated external account" permission.
Unfortunately, the tools do not make this change for you. Failing to set the associated external account permission will
cause a disabled user to no longer receive mail.
When disabling a mailbox-enabled account, follow these steps:
Start the Active Directory Users and Computers MMC snap-in.
Click View, and then make sure that the Advanced Features check box is selected.
Right-click the user account and choose Properties.
Click the Exchange Advanced tab and choose Mailbox Rights.
If another account currently has the "associated external account" right, uncheck it.
Grant the "associated external account" right to the special SELF group.
Save changes and close the property sheet.
Wait 15 minutes for replication.
After 15 minutes, right-click the user account and choose Disable Account.
It may take up to 2 hours for the mailbox to begin funtioning normally again.
For more information, please see the following Microsoft Knowledgebase article:
319047
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Mailbox Rights on new users SELF only
When you create a new mailbox, you may notice that the Mailbox Rights on the Exchange Advanced tab shows only "SELF" and none
of the other usual inherited permissions. This is because the mailbox is not actually created in the store until it has been opened for the
first time or has received its first message.
For more information, please see the following Microsoft Knowledge Base article:
Q272153
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Maximum Mailbox Size
The maximum mailbox size for Exchange 2000/2003 is 2GB. If you
try to set the quota higher than 2GB, you will receive this error:
The value for 'prohibit send' at (KB) is not valid. Specify a value from 0 through
2097151.
The reason for this limit is that there is a 2GB limit on .ost and .pst files. If a
mailbox was allowed to exceed 2GB, it would be more difficult to restore, and would be
impossible to access in offline mode. The 2GB limit on mailbox sizes is programmed into
Exchange and modifying that limit is not recommended:
microsoft.public.exchange2000.admin
newsgroup article
If you have a user who requires more than 2GB of email space, create an additional mailbox
and add it to their profile.
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Account Domain Changes
If a user is moving to a different department on campus, and that department also manages
accounts in Active Directory, we can move the account between domains. Mailboxes can also
be moved between Exchange mailbox stores or servers. There is no need to create a new account
for someone if they already have one in Active Directory.
Only Enterprise Admins can move accounts between domains. To have an account moved, please
send email to itconsult(@)oregonstate.edu. We will help you coordinate with the DCA currently
responsible for the account to find a good time to schedule the move.
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