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Register eTASK.Outlook Add-In (OAI) in Microsoft Entra ID

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IC2562
Smart Reservation

Tip: You only need to complete this step if you use Office 365.

To enable the eTASK.Outlook add-in and the eTASK server to communicate with Office 365, the eTASK.Outlook add-in app must first be registered in Microsoft Entra ID. See here for instructions on how to do this.

Procedure in Microsoft

  1. Sign in to https://portal.azure.com/.

  2. Open the Azure service Microsoft Entra ID.

    Azure portal menu showing Microsoft Entra ID icon highlighted among other service icons like Storage accounts and Monitor
    Azure portal menu showing Microsoft Entra ID icon highlighted among other service icons like Storage accounts and Monitor

  3. In the menu on the left, click App registrations and then New registration.

    Button labeled
    Button labeled "Neue Registrierung" (New Registration) with plus icon for creating a new app registration in Microsoft Entra ID

  4. Give the app registration a name of your choice and, under Supported Account Types, select the option Accounts in any organizational directory (any AD directory – multi-instance capable).

  5. Under Redirect URI, select Public Client/Native (Mobile or Desktop) and enter http://localhost in the input field. Then click Register.

    Blue button labeled
    Blue button labeled "Registrieren" (German for "Register")

  6. In the menu on the left, click API Permissions and then Add Permission.

    Two buttons: blue
    Two buttons: blue "Berechtigungen hinzufügen" (Add permissions) button and gray "Verwerfen" (Discard) button

  7. Select the APIs used by my organization tab and search for Office 365 Exchange Online.

    API-Berechtigungen anfordern: Auswahl zwischen Microsoft-APIs, Organisations-APIs und eigenen APIs. Office 365 Exchange Online ausgewählt.
    API-Berechtigungen anfordern: Auswahl zwischen Microsoft-APIs, Organisations-APIs und eigenen APIs. Office 365 Exchange Online ausgewählt.

Click Delegated Permissions and, under EWS, enable the EWS.AccessAsUser.All.

Error message: Delegated permissions required. Application must access API as authenticated user.
Error message: Delegated permissions required. Application must access API as authenticated user.
Checkbox for EWS.AccessAsUser.All permission: Access mailboxes as logged-in user via Exchange web services
Checkbox for EWS.AccessAsUser.All permission: Access mailboxes as logged-in user via Exchange web services

Then click Add Permissions.

Button labeled
Button labeled "Berechtigungen hinzufügen" (Add permissions) in blue, next to gray "Verwerfen" (Discard) button


  1. Click Authentication in the menu on the left. Set the toggle under Advanced Settings and Allow Public Client Flows to Yes. Then click Save.

    Screenshot of extended settings in German, showing option to allow public client flows with toggle switch set to
    Screenshot of extended settings in German, showing option to allow public client flows with toggle switch set to "Ja"

You have successfully registered Active Directory in Microsoft Entra ID and can now proceed to configuration in the eTASK.FM portal. To do

so, use: 📄 OAI-App-Registrierung aus Microsoft Entra ID in eTASK registrieren IC2562

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