Using PHP-EWS to update Automatic Replies (Out of Office) - php

I am attempting to develop a web interface using PHP which would allow any authorised user (specifically from the HR department) to update the Automatic Reply (Out of Office) of any active Exchange user/mailbox. I have successfully connected to the Exchange Web Services (Office 365) using php-ews (https://github.com/jamesiarmes/php-ews) and retrieved user mailbox configuration. However, I am unable to locate anything concerning Automatic Replies (Out of Office). Is there anyone who could provide examples or guidance on how this can be achieved?

You will need to use the GetUserOofSettings https://msdn.microsoft.com/en-us/library/office/aa563465(v=exchg.150).aspx and SetUserOofSettings https://msdn.microsoft.com/en-us/library/office/aa580294(v=exchg.150).aspx to do that in EWS. You will also need to use Impersonation to have the specific rights to do that make those changes https://msdn.microsoft.com/en-us/library/office/dn722377(v=exchg.150).aspx.
If your using Office365 your other option is you can use the Graph API to also do the same thing https://developer.microsoft.com/en-us/graph/docs/api-reference/v1.0/api/user_get_mailboxsettings which gets around any security hassles that EWS Impersonation might cause.

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Quoting the article above:
Google APIs such as the Prediction API and Google Cloud Storage can act on behalf of your application without accessing user information. In these situations your application needs to prove its own identity to the API, but no user consent is necessary. Similarly, in enterprise scenarios, your application can request delegated access to some resources.
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On additional note, I’d also recommend adhering to the How to Ask guidelines in order for your questions to be properly answered by the community. If you could also provide a minimal reproducible scenario as well as the code used and which difficulties you had with it would greatly help and improve your chances to get a meaningful answer in the future.

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Instead, use your app as a proxy and validate the Google Play information on your server as described here.

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