Exchange Online REST API

Question

Hello,&nbsp;I want to use the REST-API from my Exchange Online account to edit the calendar entries.When I try to connect with "invoke-webrequest" I get an error 403.&nbsp;Where can I enable the API for my account in Exchange Online settings?&nbsp;Regards,Martin

vasilmichev · Answer

REST is enabled by default. Are you providing an access token as part of the request? Do you have the necessary permissions to access the endpoint you are trying to (assuming you are using /user@domain.com/contacts)?

martin strasser · Answer

Hello,&nbsp;I tried it with:&nbsp;iwr "https://outlook.office.com/api/v2.0/me/calendarview?startDateTime=2018-05-01T01:00:00&amp;endDateTime=2018-10-31T23:00:00" -Credential $(Get-Credential)&nbsp;And the result is:&nbsp;iwr : The remote server returned an error: (403) Forbidden.At line:1 char:1+ iwr "https://outlook.office.com/api/v2.0/me/calendarview?startDateTim ...+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : InvalidOperation: (System.Net.HttpWebRequest:HttpWebRequest) [Invoke-WebRequest], WebExc eption + FullyQualifiedErrorId : WebCmdletWebResponseException,Microsoft.PowerShell.Commands.InvokeWebRequestCommand&nbsp;Regards,Martin

vasilmichev · Answer

You cannot pass credentials directly. You need to get a token and pass that token via an auth header. The documentation on that is here: https://docs.microsoft.com/en-us/outlook/rest/get-started

krisv · Answer

Hi i am trying to access a functional email box messages using the outlook API 2.0 using my credentials using the below line. i get a Forbidden 403 error. my intention is to search for a certain subject in the functional email box and download the attachment.&nbsp; Pls let me know what should i check from my side.&nbsp;$mail =Invoke-RestMethod -Headers @{Authorization =("Bearer "+ $Authorization.access_token)}`-Uri https://outlook.office.com/api/v2.0/users/retailoperations@domain.com/messages `-Method Get&nbsp;The below one works for accessing my email inbox.&nbsp;$mail =Invoke-RestMethod -Headers @{Authorization =("Bearer "+ $Authorization.access_token)}`-Uri https://outlook.office.com/api/v2.0/me/messages `-Method Get

vasilmichev · Answer

Since you are accessing other people's messages, you need the relevant permissions - either Full Access permissions on their mailbox, or a corresponding API-level permissions via the app you are getting the token for.

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Exchange Online REST API

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