Cannot open room mailbox

When attempting to create a Room Mailbox in Exchange 2007, the creation completes successfully.  However, I am unable to open the mailbox.  My AD user is a member of Exchange Organization Administrators.  TechNet suggests that I need to be a member of Exchange Recipient Administrators and while EOA's permissions exceed those of ERA, I did attempt to create the mailbox while only a member of ERA (just to humor my colleagues) and, of course, it completed successfully but I was still unable to open the mailbox.  I've attempted this numerous times using both the Management Console and PowerShell alike.  It may be worth while for me to mention that we're in the midst of a migration from Domino to Exchange (though I seriously doubt that has any bearing on this problem).  Attempt and error message is included below.  We're stumped!  Please advise!

[PS] C:\Documents and Settings\DerrickNordberg\Desktop>get-mailboxcalendarsettin
gs

Identity                                                     AutomateProcessing
--------                                                     ------------------
yvmh.org/Memorial Groups and Users/Standard/Policy Exempt... AutoUpdate
yvmh.org/Memorial Groups and Users/Standard/IS/Seghers, B... AutoUpdate
yvmh.org/Memorial Groups and Users/Standard/IS/Hatton, Sp... AutoUpdate
yvmh.org/Memorial Groups and Users/Standard/Policy Exempt... AutoUpdate
yvmh.org/Memorial Groups and Users/Standard/IS/Van Horn, Les AutoUpdate
yvmh.org/Memorial Groups and Users/Standard/Policy Exempt... AutoUpdate
yvmh.org/Memorial Groups and Users/Standard/IS/Skotland, Bev AutoUpdate
yvmh.org/Memorial Groups and Users/Standard/Policy Exempt... AutoUpdate
yvmh.org/Memorial Groups and Users/Standard/IS/Bates, Dee    AutoUpdate
yvmh.org/Memorial Groups and Users/Standard/IS/Franz, Andy   AutoUpdate
yvmh.org/Memorial Groups and Users/Standard/IS/Pomeroy, R... AutoUpdate
yvmh.org/Memorial Groups and Users/Standard/IS/Gill, Paul    AutoUpdate
yvmh.org/Memorial Groups and Users/Standard/IS/Stevens, I... AutoUpdate
yvmh.org/Memorial Groups and Users/Standard/IS/Larsen, Laura AutoUpdate
yvmh.org/Memorial Groups and Users/Standard/IS/Wells, Paula  AutoUpdate
yvmh.org/Memorial Groups and Users/Standard/Xyloc Nurse U... AutoUpdate
yvmh.org/Memorial Groups and Users/Standard/Standard with... AutoUpdate
yvmh.org/Memorial Groups and Users/Standard/IS/Bohlke, St... AutoUpdate
yvmh.org/Memorial Groups and Users/Standard/IS/Dominguez,... AutoUpdate
yvmh.org/Memorial Groups and Users/Standard/IS/Kisner, Jason AutoUpdate
yvmh.org/Memorial Groups and Users/Standard/IS/Lapsley, Mark AutoUpdate
yvmh.org/Memorial Groups and Users/Standard/Standard with... AutoUpdate
yvmh.org/Memorial Groups and Users/Standard/Policy Exempt... AutoUpdate
yvmh.org/Memorial Groups and Users/Standard/IS/Edwards, J... AutoUpdate
yvmh.org/Memorial Groups and Users/Standard/IS/Garcia, Ma... AutoUpdate
yvmh.org/Memorial Groups and Users/Standard/IS/Scheidegge... AutoUpdate
yvmh.org/Memorial Users/Panattoni, Dale                      AutoUpdate
yvmh.org/Memorial Users/Nordberg, Derrick                    AutoUpdate
yvmh.org/Memorial Users/Leland, Ryan                         AutoUpdate
yvmh.org/Memorial Groups and Users/Standard/IS/Cox, Jeremy   AutoUpdate
yvmh.org/NOTESYVMH/Migration 1                               AutoUpdate
yvmh.org/NOTESYVMH/Migration 2                               AutoUpdate
yvmh.org/NOTESYVMH/Migration 3                               AutoUpdate
yvmh.org/NOTESYVMH/Migration 4                               AutoUpdate
yvmh.org/NOTESYVMH/Migration 5                               AutoUpdate
yvmh.org/Memorial Groups and Users/Standard/Standard with... AutoUpdate
Get-MailboxCalendarSettings : Cannot open mailbox /o=MEMORIAL/ou=Exchange Admin
istrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=RoomTest.
At line:1 char:27
+ get-mailboxcalendarsettings <<<<
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mass2612Connect With a Mentor Commented:
Hi,

Even though you are an admin account that doesn't mean that you have access to open mailboxes. By default Exchange doesn't allow this. You probably need to add permissions to the mailbox to open it. Try this: -

Add-MailboxPermission RoomTest -AccessRights:fullaccess -User:YourAccount

or for a group try: -

Add-MailboxPermission -Identity your_group -AccessRights FullAccess -User RoomTest
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Computer101Commented:
Forced accept.

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