Outlook Web Access “A problem occurred while trying to use your mailbox”

Problem:

Client is attempting to access Outlook Web Access (OWA) and are returned the following error after login attempt:
A problem occurred while trying to use your mailbox. Please contact technical support for your organization.
and/or
An unexpected error occurred and your request couldnt be handled.

Cause:

This issue occurs when the msExchVersion attribute is not set correctly on the user object in the Active Directory. Exchange 2007 uses the msExchVersion attribute to determine the version of Exchange that user objects are associated with. If the version value is less than 0.1, Exchange 2007 considers the object “read-only” and cannot write changes to the object.

Outlook Web Access "A problem occurred while trying to use your mailbox"

Meeting organizer name replaces Subject in Exchange Resource

Problem:

Client creates a new Meeting request in Microsoft Outlook and adds a Conference Room or another Exchange Resource. When the meeting reaches the Resource Calendar the Subject line is deleted and replaced by the organizers name.

Cause:

Microsoft Exchange Resources set to AutoAccept meeting requests (AutomateProcessing: AutoAccept), by default delete the subject and replace it with the organizers name. Though this feature can make sense in some scenarios it can cause confusion in most.

Meeting organizer name replaces Subject in Exchange Resource

Unable to Modify Delegate Permissions – The Delegates settings were not saved correctly

Problem:

Client is attempting to modify Delegate Permissions for an Outlook resource and are returned the error:

The Delegates settings were not saved correctly. Unable to activate send-on-behalf-of list. You do not have sufficient permission to perform this operation on this object.

or

The Delegates settings were not saved correctly. Cannot activate send-on-behalf-of list. You do not have sufficient permission to perform this operation on this object.

Unable to Modify Delegate Permissions - The Delegates settings were not saved correctly

Cannot start Microsoft Outlook. Cannot open the Outlook window

Problem:

Client is unable to launch Outlook; returns the error: “Cannot start Microsoft Outlook. Cannot open the Outlook window” and then closes.

Cause:

A corrupt profilename.xml file may be causing the conflict.

Cannot start Microsoft Outlook. Cannot open the Outlook window