Get MS Exchange mail for all group members

Question

Is it impossible to get all email from all mailboxes in MS Exchange? I have full rights in Azure console for Office365 exchange online.
http: //i.stack.imgur.com/DF5n5.png
But when I'm trying make an request to
https://outlook.office365.com/EWS/OData/Users('[email protected]')/Inbox/Messages
getting an error "The specified object was not found in the store."
But for logged in admin
https://outlook.office365.com/EWS/OData/Me/Inbox/Messagesor
https://outlook.office365.com/EWS/OData/Users('[email protected]')/Inbox/Messages
works well.
What should I do, to get access for read mail for all my users in office 365?

Answer 1

Hi,
Best way is to use a service \admin user to read all emails of all (or a set of) mailboxes, but first you would have to setup permission to all mailboxes using :
1. Exchange Application Impersonation
OR
2. Delegate Access (where u grant Full Access permission for a single service account to all mailboxes)
Please have a look into:
http://kb.infobridge.com/KnowledgebaseArticle10370.aspx
http://www.codetwo.com/kb/how-to-set-impersonation-rights-manually/
https://support.software.dell.com/kb/SOL81894
This way you would have to keep only one credential to access all mailboxes using EWS.
There is a little difference in setting up ExchangeService (EWS) object for both methods. Using delegate permission you can setup more granular permission (ie. to one or many or all mailbox folders), while using impersonation, there is no choice, the impersonated
user has all folders access to target mailbox.
Also, impersonation is setup only once, while, in the case of Delegated permission, for any new mailbox user, you would have to run
Add-MailboxPermission “[email protected]” –User “AdminUSer” –AccessRights FullAccess
to grant the permission.
Hope this helps.
Regards,
Laeeq Qazi|Team Lead(Exchange + Sharepoint + BES + DynamicsCRM)
www.HostingController.com