Was able to login to Powershell
Here is error message
PS C:\Windows\system32> Get-Mailbox -Identity dcooley@cotnerandcooley.com
The operation couldn't be performed because object 'dcooley@cotnerandcooley.com' couldn't be foun
namprd05.prod.outlook.com'.
+ CategoryInfo : NotSpecified: (:) [Get-Mailbox], ManagementObjectNotFoundException
+ FullyQualifiedErrorId : EC0D27F8,Microsoft.Exchange.Management.RecipientTasks.GetMailbox