Setting OOF for other users using EWS

Question

Hello everyone,
I try to set the OOF for other users using EWS in an Exchange 2010 SP2 environment.
I use this code:
ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2010_SP2);
service.Credentials = new NetworkCredential("username", "password", "domain");
service.TraceEnabled = true;
service.TraceFlags = TraceFlags.All;
service.AutodiscoverUrl("[email protected]");
OofSettings OOFSettings = new OofSettings();
OOFSettings.ExternalAudience = OofExternalAudience.All;
OOFSettings.ExternalReply = "Test";
OOFSettings.State = OofState.Enabled;
service.SetUserOofSettings("[email protected]", OOFSettings);
The account I use is a Service Account our Exchange Team set up. I can see all service properties, so I would assume that the connection to the ExchangeService works fine.
However when SetUserOofSettings executes, I receive a ServiceResponseException “Connection did not succeed. Try again later”.
What am I missing? Unfortunately, the error message does not provide any helpful informations.
Thank you and best regards
Julian

Answer 1

>The account I use is a Service Account our Exchange Team set up. I can see all service properties, so I would assume that the connection to the ExchangeService works fine.
 What rights have they given the account, giving an Account Exchange Admin permissions won't give you any rights to access the Mailbox content. For this to work the account you using would need to be either have been granted Full Access via Add-MailboxPermission
or been given Application Impersonation rights (if its the later you need to make sure you use impersonation in your code).
 I would suggestion you try using the EWSEditor
http://ewseditor.codeplex.com/ to test this out eg try connecting to the users folders and then try the OOF operation via the EWSEditor option to see if this works.
 Other things to check is if this is a Brand new mailbox that has never been connected to before then the Mailbox folders won't be initialized (you can check this using Get-Mailboxstatistics) and you would get an error trying to perform any of
the EWS operations. If it works on some users and not others the possibly your getting throttled.
Cheers
Glen