Hi,
We are using Exchange 2013 with the CU6 update recently applied. Since this update we are getting this error when editing some transport rules - After the edit (add or remove a domain name to a cannot sent to rule) then Clicking SAVE The error reported: A word specified for a transport rule must contain at least one non-blank character and may not begin or end with a blank character. A word that consists of only blank spaces isn't allowed.
Reading this error - I can verify there are no blanks anywhere - and all looks good when you look up the rule via powershell.
The only edit you can really do is change the name. This is allowed but it seems when adding / removing a name from the rule the error is reproduced. We have been happy maintaining this for months, and it has only recently come about. The only real change was our update to CU6.
Anyone able to advice?