Access token is empty
Microsoft Graph is here to unite Azure and Office data under a single roof. Using the API is as simple as sending an HTTP request - for example, calling this method will return the details about the users in the directory:.
As it turns out, in order to use any of the Microsoft Graph API, we need to let it know who we are - who is making the request. Microsoft Graph API uses Bearer Authentication in order to validate the request, which means it expects to receive an authorization token sometimes called a bearer token together with the request. This token will contain, in a secured way, all the details about the requester. Sending an authorization token with the request is a simple matter, all we need to do is to add an Authorization header to the request containing the word Bearer and our authorization token:.
It is not important to understand the token format for now, only that once we get a valid access token we can use it to access the information we need. Azure Active Directory is where all of our organization's users are stored. Since the data we want to retrieve from the Graph API is usually related to specific users, it only makes sense that we need to use Azure Active Directory Services in order to retrieve a valid access token.
Meaning every tenant directory has its own URL. The directory name can be found by hovering over our name in the Azure Portal. So now that we know what the authorization endpoint URL is, what message do we need to send in order to get an access token?
Well, the answer for that is - it depends. The service supports several OAuth authentication flows, each suited for a different scenario and the kinds of information we have. Regardless of the kind of message we send, the response will always contain the Access Token. But, before we can look at the different options, we first need to understand another important part of the puzzle.
In order to get those, we first need to create an OAuth App. A very important concept in the OAuth world is the separation between users and clients.
Users are the actual people who use our system. Clients are the applications they are using to do so. Why is this separation important?Facebook access token is an opaque string which is used to identify the user, application, or page and can be applied by the application to make graph API calls. Getting token for Facebook page is absolutely free. Access token is only valid for two months, so make sure you take all these steps again in two months, to refresh the Facebook token.
Now you have read the whole article and if you still have questions, check our FAQ. You may find the answers there. More information on the permissions is available here. We will be glad to help!
How do I know which permissions to choose for my app? Depending on the functionality you want, choose one or several permissions from the lists below. Bare in mind that this permission is restricted to a limited set of partners. This one is restricted to a limited set of partners. This permission is also restricted to a limited set of partners.
What is refresh token? Refresh tokens carry the information necessary to get a new access token. They are also expire but usually they are long-lived.
Can I get a permanent access token? There are only two types of tokens available: short-lived and long-lived. Check all features and find out the coolest look of the Facebook Feed on your website. Share this post.
Twitter Facebook. You may also like Tutorials. More posts.Excel is not letting me add a row to a table. This was working just fine last week, now it seems I don't have authorization. I am logged in to Flow, Excel, and Powerapps. I have edit permissions to the Excel file. I included a screenshot of the error details below. Thanks for your help! I'm also running into this issue.
Crossing my fingers that it can be fixed very soon. I'm having this problem as well since Wednesday. I'm sure they won't contact me by this time.
I am having this same issue. I can tell thought that the problem seems like the system is not able to retrieve the token and so executing API REST functions it says "Access token is empty" and so you're not allowed to execute anything. I've got the issue fixed yey! I still get the "Access token is empty" message whenever I try to add a new row into Excel Online. Then go to the specific flow and you should be able to see the Excel Online Business with an alert, it will ask you to create a new connection for fixing the issue:.
Even though, as I said before, I didn't received any email back about the fix, so it might be temporary. Haven't done anything, so it seems the Microsoft Team got it fixed. Any update on this?
Any other ideas for a workaround or timing for a proper fix from Microsoft? Just kept messing with the flow and selecting alternate connection for the Excel Online and it eventually prompted me right inside the flow. Update from me: I'm now only getting the error if I manully run the flows now e.
Flows that run automatically seem to be ok with the Excel Online connection. I have a ticket open with Microsoft and will follow-up with what I learn. Click for the top entries. Skip to main content.
Turn on suggestions. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. Showing results for.Understanding Refresh Tokens Learn about refresh tokens and the role they serve in the authorization process. Modern secure applications often use access tokens to ensure a user has access to the appropriate resources, and these access tokens typically have a limited lifetime.
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This is done for various security reasons: for one, limiting the lifetime of the access token limits the amount of time an attacker can use a stolen token. In addition, the information contained in or referenced by the access token could become stale.
When access tokens expire or become invalid but the application still needs to access a protected resource, the application faces the problem of getting a new access token without forcing the user to once again grant permission. To solve this problem, OAuth 2. A refresh token allows an application to obtain a new access token without prompting the user. A refresh token can be requested by an application as part of the process of obtaining an access token.
Many authorization servers implement the refresh token request mechanism defined in the OpenID Connect specification. After the user successfully authenticates and grants consent for the application to access the protected resource, the application will receive an authorization code that can be exchanged at the token endpoint for both an access and a refresh token.
To use a refresh token to obtain a new ID token, the authorization server would need to support OpenID Connect and the scope of the original request would need to include openid. While refresh tokens are often long-lived, the authorization server can invalidate them.
Getting Access Token for Microsoft Graph Using OAuth REST API
Some of the reasons a refresh token may no longer be valid include:. Because refresh tokens have the potential for a long lifetime, developers should ensure that strict storage requirements are in place to keep them from being leaked. For example, on web applications, refresh tokens should only leave the backend when being sent to the authorization server, and the backend should be secure. The client secret should be protected in a similar fashion.
Mobile applications do not require a client secret, but they should still be sure to store refresh tokens somewhere only the client application can access. Languages with SDK support include Node. To learn more about refresh tokens at Auth0, including how to revoke them, check out the refresh token documentation. Subscribe to more awesome content!
Contact Us. Learn about the de facto standard for handling authentication in the modern world. Some of the reasons a refresh token may no longer be valid include: the authorization server has revoked the refresh token the user has revoked their consent for authorization the refresh token has expired the authentication policy for the resource has changed e.Using the API is as simple as sending HTTP request — for example calling this method will return the details about the users in the directory:.
As it turns out, in order to use any of the Microsoft Graph API, we need to let it know who we are — who is making the request. Microsoft Graph API uses Bearer Authentication in order to validate the request, which means it expects to receive an authorization token sometimes called a bearer token together with the request. This token will contain, in a secured way, all the details about the requester. Sending authorization token with the request is a simple matter, all we need to do is to add an Authorization header to the request containing the word Bearer and our authorization token:.
There are several kinds of authorization tokens — Graph API requires an access token. The token itself is a looks like a random base 64 string, something like:. It is not important to understand the token format for now, only that once we get a valid access token we can use it to access the information we need.
Azure Active Directory is where all of our organization users are stored. Since the data we want to retrieve from the Graph API is usually related to specific organization users, it only makes sense that we need to use Azure Active Directory Services in order to retrieve a valid access token.
Using those services, we can issue access tokens for the Graph methods as well as id tokens and refresh tokens which are not in the scope of this article. Meaning every tenant directory has its own URL. The directory name can be found by hovering over our name in the Azure Portal. So now that we know what is the authorization endpoint URL, what message do we need to send in order to get an access token? Well, the answer for that is — it depends. The service support several OAuth authentications flows, each suited for different scenario and the kind of information we have.
Regardless of the kind of message we send, the response will always contain the Access Token. But before we can look at the different options, we first need to understand another important part of the puzzle. In order to get those, we first need to create an OAuth App.
A very important concept in the OAuth world is the separation between users and clients.Introduction to JWT (JSON Web Token) - Securing apps & services
Users are the actual people who use our system. Clients are the applications they are using to do so. Why is this separation important? In the past, when applications wanted to access data in another system or database which required authentication it had two options:.
Yammer api - access token empty for pending users.
In many times the first option was not used — sometimes because it was complicated to perform SSO is hard to get rightor the current user did not have enough permissions to perform the operation the application required. This leaves out the second option, of impersonating a strong user.
But which user to impersonate?GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.
Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Already on GitHub? Sign in to your account. PS char Any pointers why this is so inconsistent? Why does create the teams sometimes and why does it fail most times?
I asked the PM that owns Teams and she said that the 0. You can see the version with the command get-module -listavailable and then look for MicrosoftTeams in the Name column and the Version is just to the left. Also, not sure if this is the same issue but adding a link: SamCosby - could these be related to the issue? Any thoughts islubin?
That way a dedicated resource to track down. I am still working to figure out too and we can update Notes section in docs with resolution. On a separate note - you shouldn't be trying to combine providing a teamname with an existing group conversion. If you're converting a group, it already has a display name.
If i am lucky it fires off fine, else it continues to fail. And, no i am not converting an existing group. I am passing the teamname as a parameter to the script to be the name of the Team we are trying to create through script.
GroupId, which I thought you were feeding into New-Team. Adding in nkramer. Could be something failing against the IDP of some sort.
SamCosby Thanks for reaching out over email and getting a working session on. For the benefit of the rest on this thread: We are looking at utilizing Azure runbooks Azure automation services to run the MicrsoftTeams powershell, which has been more promising at this point.
However, we notice a lot of lag, approx. Secondly, there are no notifications being sent out to the users, when added to a team through PowerShell - any inputs on this? Guys, We tried an alternate approach on this by executing the PowerShell on Azure Runbooks and invoking the runbook through MS Flow, that works like a charm and we do not get errors of any sort.
So for now, until the bearer access token issue can be fixed, we will proceeding with hosting our PowerShell as an Azure Runbook. Just thought i would share here for the benefit of the community. SamCosby yeshwanthjagannath - this is really great info. I wonder if there is something we could add to the Notes section of the connect cmdlet? Should we leave this issue open for now? Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.
Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I have decoded the token using jwt. It contains 14 claims. Does this simply mean that my app is Unauthorized, and the error message is just misleading access token is empty? Or have I done something wrong? Update: I have noted that the although the token does contain claims it does not have a scope claim which seems a bit weird to me.
I would assume that it had the User. All scope. So "Access token is empty" probably actually meant not present or even "No authorization header in request". For User. All scope you can't have a user consent. It must be admin consent. It looks like you may have missed consenting your app using an admin account. For me, my issue was that I had put a linebreak between the request url and the Authorization header, making it the body instead. A stupid mistake, but easy to overlook - if you get to this post you have probably done a silly mistake like OP typo or this.
Look through your request syntax again! Learn more. Asked 1 year, 8 months ago. Active 1 month ago. Viewed 6k times. I can't recall ever seeing 'Access token is empty'. Have you confirmed that you have the correct permissions to make that call: developer. The admin that registered the application for me told me that he gave the application "Read all users" permissions. Active Oldest Votes. The Authorization header was misspelled. One URL works while the other doesn't. Unheilig Suneel Suneel 21 4 4 bronze badges.
Chris Johnson Chris Johnson 4 4 silver badges 12 12 bronze badges. Admin consent was not the issue here. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown.
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