Hosted Exchange - How to check if a Mailbox allows Outlook Anywhere

Some Mailboxes in Hosted Exchange may not allow Outlook Anywhere, this is when they have been created as Basic Users and have been upgraded to Standard Users. The guide shows how to check this and how to rectify this.

#1 Get-CASMailbox

Open the Exchange Management Shell and run the commandlet Get-CASMailbox user.name@domain.com | FL

This will now display all the properties for the CAS Mailbox.

#2 MAPIBlockOutlookRpcHttp

Check the property MAPIBlockOutlookRpcHttp if this is set to True then the user is blocked from Outlook Anywhere.

#3 Change Setting

Extend the commandlet to change the setting for the mailbox using the boolean setting True False

Get-CASMailbox user.name@domain.com | Set-CASMailbox -MAPIBlockOutlookRpcHttp $false

#4 Check Change

Run the Get-CASMailbox user.name@domain.com and check the setting has now changed to False