A client having Exchange 2013 recently faced a strange issue while logging in to OWA. The error is shown below :
Upon further analyzing the error, it was found that this error can occur due to two reasons:
- If the attribute msExchVersion value is different for a user
- Due to insufficient permissions
First, we can check the Exchange version for a particular user who has the issue. For this, execute the below command in EMS:
Get-Mailbox <User_Name>| format-list ExchangeVersion
If the value that returns is less than 0.1, then the Exchange Server will consider this user object only as Read-only. This issue can be resolved by executing the command :
Set-Mailbox <User_Name> -ApplyMandatoryProperties
If you again check the Exchange version it will show a value like eg: 88218628259840 [ for Exchange Server 2013]
You can also check the value of the attribute msExchVersion from attribute editor in ADSIEdit.
If you still face issues when accessing owa or ecp, perform the second step.
- Navigate to Active Directory Users and Computers
- Find the user and select Properties -> Security -> Advanced
- Select Enable inheritance
- Add a Principal value like Domain Admins and required access type
- Click OK
- Check and confirm that OWA or ECP is accessible without any issues
Reference: http://support2.microsoft.com/kb/941146