I can not connect to any additional users Mailboxes with outlook?

Johne75 used Ask the Experts™
I have Exchange 2007 SP1 on a MS Standard 2008 64 bit box. At my client desktop I have outlook 2007. I have had several profiles set up to view other users email to assist with issues. Now any new user I set up it will not allow me to connect. As usuall I am prompt for user name and password of the admin account. I enter the credentials in no different than any of the accounts that do work and I get an error it reads:
"Cannot open your default e-mail folders. Microsoft Exchange is not available. Either there are network problems or the Exchange Computer is down for maintenance."
Other profiles open without problem. Please Advise and thank you!

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Have you checked to see the full access permission on those accounts?  If you go to Exchange 2007 and right click a users mailbox check the Manage Full Access Permission.  Add the admin account and you should be able to manage the account.
If you need access to all mailboxes (like for a Blackberry service account) you can run the following powershell script.

get-mailbox -resultsize:unlimited | add-mailboxpermission -user username -accessright Fullaccess

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