Wednesday, January 28, 2009

Distribution Group Assigning "Send As" Permissions to a user

It was brought to my attention that following the steps listed in KB327000 (, which applies to Exchange 2000 and 2003, to assign a user "Send As" permission as another user did not appear to work. I too tried to follow the steps and found that they did not work. I know this feature works, so I went looking around for other documentation on this and found KB281208 ( which applies to Exchange 5.5 and 2000. Following the steps in KB281208 properly gave an user "Send As" permission as another user. But I found the steps listed in KB281208 were not complete either. The additional step that I performed was to remove all other permissions other than "Send As". Here are the modified steps for KB281208 that I performed (changes noted in blue):

1. Start Active Directory Users and Computers; click Start, point to Programs, point to Administrative Tools, and then click Active Directory Users and Computers.

2. On the View menu, make sure that Advanced Features is selected.

3. Double-click the user that you want to grant send as rights for, and then click the Security tab.

4. Click Add, click the user that you want to give send as rights to, and then check send as under allow in the Permissions area.

4.5 Remove all other permissions granted by default so only the send as permission is granted.

5. Click OK to close the dialog box.

So after I verified that the steps for KB281208 worked, I was curious as to why the steps for KB327000 did not work. What I found was that Step #7 of KB327000 applied to the permission to "User Objects" instead of "This Object Only". Here are the modified steps for KB327000 that I performed:

1. On an Exchange computer, click Start, point to Programs, point to Microsoft Exchange, and then click Active Directory Users and Computers.

2. On the View menu, click to select Advanced Features.

3. Expand Users, right-click the MailboxOwner object where you want to grant the permission, and then click Properties.

4. Click the Security tab, and then click Advanced.

5. In the Access Control Settings for MailboxOwner dialog box, click Add.

6. In the Select User, Computer, or Group dialog box, click the user account or the group that you want to grant "Send as" permissions to, and then click OK.

7. In the Permission Entry for MailboxOwner dialog box, click This Object Only in the Apply onto list.

8. In the Permissions list, locate Send As, and then click to select the Allow check box.

9. Click OK three times to close the dialog boxes.

The KB articles were updated to include correct information. But, if you had problems with this in the past, this might be why!

- Chris Ahlers

Published Friday, January 07, 2005 9:52 AM by Exchange
Filed Under: Directory, Administration, All Posts

Of course, the key wording above is the line that reads You do not have permission to send to this recipient. Is it possible to speed up this permissions change process? Well, I haven’t been able to get someone from Microsoft to confirm this, but I believe it’s possible via the Mailbox Cache Age Limit registry key documented in KB article 327378. The KB article mentions changing the Mailbox Cache Age Limit registry key, which according to the article is used to re-read logon quota information. In my experience, modifying this key (or creating it if it doesn’t exist) with a suitable value, in minutes, speeds up the permissions change process. Note that you must restart the Information Store service after modifying this registry key. The general consensus of opinion here is not to make this value too low; a sensible value is 15 minutes. The alternative to creating or modifying this registry key is to simply re-start the Information Store service, which appears to make the permissions changes take effect immediately. Of course, restarting the Information Store service is rarely practical during business hours and you may also not prefer to go poking around in the registry, so you can also choose to wait for the permissions to be re-read at the next interval, which, as stated earlier, could be up to 2 hours.

Once the permissions have been granted and successfully taken effect, the assistant can send the message as normal. What does the recipient of the message actually see? Quite simply, the recipient will not be able to tell that it was the assistant who actually sent this message as it will appear just as if the manager had sent it. We’ll talk about another method, the Send on Behalf of method, a little later in this article.

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