Hi All!
I have an odd issue whereby we're using Office365 at this stage, purely for Lync online and Sharepoint Online/OneDrive Business.
What I'm finding is that when attempting to 'Share' documents/folders in OneDrive with users within the organisation, I receive a bound back/NDR that contains the following:
Delivery has failed to these recipients or groups:
User1@contoso.com
A communication failure occurred during the delivery of this message. Please try resending the message later. If the problem continues, contact your helpdesk.
User2@contoso.com
A communication failure occurred during the delivery of this message. Please try resending the message later. If the problem continues, contact your helpdesk.
Diagnostic information for administrators:
Generating server: SMT947322-000.YLO001.MSOPRD.MSFT.NET
User1@contoso.com
#< #5.5.0 smtp;550 Requested action not taken: mailbox unavailable> #SMTP#
User2@contoso.com
#< #5.5.0 smtp;550 Requested action not taken: mailbox unavailable> #SMTP#
We have on on-premises Exchange 2010 server and I'm not sure why we'd be getting this sort of bounce back unless I've possibly not configured a relay somewhere?
Your thoughts would be appreciated!
Cheers,
Sandeep