Restrict Microsoft Graph Service Account / Client Credentials - microsoft-graph-api

I'm developing an application on Microsoft Graph that runs as a daemon, and needs access to many accounts. As a result, I'm using a service account, also known as client credentials (using this method).
I can request the proper scope (calendars.readwrite) however as far as I can see, I cannot restrict to which calendars I have access. In my case, I only need access to the meetingroom calendars, and I'm afraid that organisations will not allow my application if I can also read and write from/to the CEO's calendar.
Is there any way (either while creating the app, or during/after giving admin consent) to restrict my app to only a subset of calendars? Or should I approach this problem differently and (e.g.) not use a service account in the first place?

Related

Cannot get joined teams using Graph for external users using mail identity

I am attempting to use "v1.0/me/joinedTeams" to get all the joined teams for the currently authenticated user in my asp.net service. This works fine for external accounts that use a Microsoft identity (have a live account) but the same call returns a 400 Bad Request when I attempt to use an external account that uses a mail identity (no live account). The request is the same regardless of external account type. The token generated when authenticating as the mail identity external user looks correct when I inspect it.
I have been able to implement a workaround where I instead use the SharePoint REST service to get the groupId for the team site the user is apart of and then use the Graph call "v1.0/teams/{groupId}" to get that team. However, I need to do this for all the teams the external user has access to which slows things down quiet a bit.
I am aware of what looks like a bug in Graph when trying to make any Graph calls with any external user type, described here: https://github.com/OneDrive/onedrive-api-docs/issues/1039. I have also implemented the workaround for this issue which requires first accessing each site the user has access to by making some arbitrary call using the REST service. Then any subsequent calls using Graph should work. I do this for external accounts with a mail identity before trying to make the joinedTeams call but still run into the 400 response.
These workarounds will suffice in the short term but they increase my execution time significantly, especially when there is a large number of teams the external user is apart of. Any insight on a solution is greatly appreciated.
/me/joinedTeams is not available for personal Microsoft accounts. Se the table on this page

How do I scope and obtain admin authorization for my Microsoft Graph API daemon from my admin team?

I have a specific SharePoint site that I have been asked to integrate my web based application with in a read-only fashion using my backend server.
I currently have an app with Default Directory only (Single tenant) access
which I am modifying Application API permissions to also require Sites.Selected, however this one is requiring that I obtain Admin consent
I have had an absolute atrocious time trying to figure out how to obtain access to my specific site and not grant access to every single site in my tenant
I'm working on a dummy azure account prior to asking my ops team for the real permissions from the real ecosystem, but I dont have a sharepoint site to test on because I dont know how to set it up, the IT department team who manages it is very slow to answer so its difficult to move the ball forward without knowing exactly what I need before asking.
Under "Enterprise Applications" > {My Application Name } > Permissions (left sidebar), i see a big blue button that I read about in some docs, but i'm scared to grant the permissions because it says I give my app access to the default directory which I don't want to do, and it provides nowhere for me to specify my "selected" site
does anyone have more information on how I can grant a specific site to my app?
every article I run to talks about admin confirmation but neglects to tell me specifically how it's done
Default Directory is just a default name for your tenant, and not related to any default collection of sites. See my tenant name v6pz1 in the image
For this Sites.Selected permission, it's a 2-step process for giving your app access to the sites.
The app needs to be given permission to the site at the SharePoint level
The app needs to be granted admin consent to access the sites through the Graph API
You see this described in the MS Graph permissions reference table as well.
Allow the application to access a subset of site collections without a signed in user. The specific site collections and the permissions granted will be configured in SharePoint Online.
To actually grant your app the SharePoint permission to a site, you can use the MS Graph endpoint to create permissions

how to read ChannelMessages using ms graph win. service app (in Application permission) using current userPrincipalName

We have a daemon app that connects to teams using MS graph. It's using "Application Permissions" mode and Admin consent is granted for most permissions. We are able to add channels (private or 'standard'), add/remove members, etc... from this service based on company requirements. All is well.
For the ChannelMessages, we'd like to be able to retrieve them based on userPrincipalName, from the same tenant that the app is registered in. (I know there is an ChannelMessage.Read.All with Application Permission and it requires us to submit a form to MS, we are not currently pursuing that route...).
Do we have to create ConfidentialClientApplication object to communicate with MS graph? If so, how do we create a ClaimsPrincipal or ClaimsIdentity, based only on userPrincipalName? Or is there a different solution to this problem?
Your help is appreciated.
thanks,
Art

Microsoft Graph API auhetication for service apps

We are developing a web application using Microsoft Graph, where the signed in user can, Export all the calendar events to a third party calendar Application. After this initial export, we need to keep the exported data in sync with calendar changes via service app (a scheduled task running on server). This need to be a multi tenant application, as people from different organizations should be able to use this service.
Right now we did the authentication using OAuth 2.0 and OpenID Connect as described in this sample. Later we understood that the access token we get using this method cannot be used in the service app without user interaction. Considering our scenario what is the best way to achieve this?
I have read about App-only authorization method to do this. If we use this authentication method, the app need to be consented by a tenant administrator and the these applications are quite powerful in terms of what data they can access in the Office 365 organization. Considering we are developing a product used by different organizations, will it be feasible to use this method?
To use the client credentials OAuth2.0 flow (aka "App-only" or service account access depending on who's documentation you're reading) the admin for each tenancy will need to specify which scopes your daemon process can have for users in their tenancy. The end users can't give these scoping rights to your code themselves (as far as I know at least).
One thing to watch out for is that currently Graph API doesn't allow you to mess about with calendars that are attached to Office 365 Groups if you're using the client credentials flow. This is a pain for us, so we've raised it as an issue that needs fixing in the Office 365 feedback system. if that's an issue for you or anyone else, please throw a few votes at it so that it gets more attention at Microsoft. :-)

Transparent LiveConnect OAuth 2.0 authentication possible?

I am currently working on an application that allows users to upload/download files. My company wants to have user files stored in their One Drive and not on our server. The only problem with this is that we want to avoid double authentication in order to access their OneDrive account.
For example we have n users associated with an organization. This organization has a single OneDrive account that all of the users will share (legal?). Once a user authenticates to our application, the idea is to have our application sign them in without user interaction by using the Live API so that they may access their organizations files.
Do we have to authenticate every time we wish to use this service or just once?
It's not a big deal for us to do this once for every organization when setting up their account but a requirement is to avoid double authentication. We want the OneDrive storage to be transparent to the user.
Does this violate any of Microsoft's Terms and Conditions?
Thanks! Any input is appreciated as I've never worked on a cloud based application before. If OneDrive isn't a viable solution are there any other recommended services my company could look at?
Consumer OneDrive isn't intended for business use and sharing a single OneDrive account for multiple people isn't recommended either. You should look into OneDrive for business for your scenario: https://onedrive.live.com/about/en-us/business/.
OneDrive for Business uses the SharePoint developer APIs: http://blogs.msdn.com/b/sharepointdev/archive/2013/08/13/access-skydrive-pro-using-the-sharepoint-2013-apis.aspx
I found that the Box API does not support a grant type of passworrd. Neither does OneDrive or DropBox. Without this grant type it is impossible to sent a username and password to log a user in.

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