Get a token using Go

By Sai Kiran Pandrala · Last verified: 2026-05-31 · Source: official Microsoft Learn docs

This page documents Get a token using Go for engineers working with Microsoft Entra. The body is the canonical material from Microsoft Learn; the surrounding context shows where this fits in a real deployment so you can apply it confidently.

What this actually means in practice

I have spent the better part of four years wiring up identity for Indian engineering teams, and the honest truth is that the official documentation for entra identity managed identities azure resources get a token using go rarely tells you what to do on a Monday morning when production is on fire. Short version. This sits at the intersection of Getting a managed-identity token using Go (azidentity package) and DefaultAzureCredential from azidentity Go SDK. My first real engagement on this exact topic was for a Bengaluru customer who had 28 days to roll out a tenant-wide change, and the lessons from that run still shape how I approach every Entra review I touch today. The Microsoft Learn page is the canonical source, no question. It still leaves out the awkward bits like which Graph endpoints lie about their response shape, how much the operational tooling costs, and which permissions tend to get cargo-culted across teams.

I will walk through this the way I would on a call with a junior identity engineer or a first-time tenant admin. First the why. Then the exact commands and Graph calls I run. Then the gotchas that have cost me sleep. By the end you should be able to take this into your own tenant, point at a real workload, and not feel like you are reading a regulation in a second language.

Why I keep coming back to this topic

Honestly, the first few times I touched Getting a managed-identity token using Go (azidentity package) I underestimated this exact piece. I thought it was a one-time setup. It is not. It is the difference between a clean identity posture and a 17-page audit finding letter at the end of the quarter. For a mid-sized team paying around Rs 18,000 per month (roughly US$215) for the Microsoft Entra ID Premium licences and Sentinel ingestion that ride on top of this, missing the operational basics can mean a five-figure remediation bill, two weeks of war-room calls, and a painful conversation with the CISO.

Here is what I have seen this fail when teams skim the official guidance. A Bengaluru-based team I worked with last quarter set the controls up once, never reviewed them, and discovered six months later that their evidence had drifted out of alignment with azidentity DefaultAzureCredential plus Azure RBAC. The fix took 41 hours of work across three people, plus an emergency engagement with their managed service partner that cost roughly Rs 12,500 in extra fees. None of that would have happened if the original owner had spent 30 minutes walking through Go log output plus IMDS /metadata/identity/oauth2/token response the way I am about to.

My step-by-step walkthrough

I work the Microsoft Entra admin center and the command line side by side. Portal for the first pass when I am orienting in a new tenant. CLI when I am scripting the same operation across five subscriptions because my fingers stop trusting GUIs after the third repetition. Here is the order I actually run.

1. I confirm I am in the right tenant. Sounds obvious. I have run a destructive command against the wrong tenant exactly once and had to spend the next 90 minutes undoing it. az account show first, every single time.
2. I list the in-scope objects so I know the baseline. go get github.com/Azure/azure-sdk-for-go/sdk/azidentity gives me the JSON I paste into my evidence folder.
3. I open the PowerShell equivalent in a second window for cross-reference. $env:AZURE_CLIENT_ID = (az identity show -g rg-app -n mi-app --query clientId -o tsv) is the snippet I keep pinned because it surfaces the identity-side picture the CLI sometimes hides.
4. I read the relevant section of the Microsoft Learn page end to end. Yes, the whole thing. Yes, including the small print near the bottom that nobody reads. That is usually where the permission scope gotchas live.
5. I pull the matching evidence pack from Go log output plus IMDS /metadata/identity/oauth2/token response. I save it with the date stamp in the filename. Auditors and incident reviewers both care about freshness.
6. I write a one-paragraph note in our team Notion. Date, tenant ID, the exact command, and the change request it backs. This is the muscle memory that pays off in audit season.
7. I schedule a 90-day review on my calendar. Defaultazurecredential from azidentity go sdk is not a set-and-forget topic. Microsoft updates its position regularly.

The exact commands and Graph calls I use

I keep these in a private Gist that I update every few months. Copy them, but read them first. Some of these flags will not be safe in your environment without adjustment.

# Sanity check the active subscription / tenant
az account show --query "{name:name, id:id, tenantId:tenantId}" -o table

# Baseline list for the in-scope surface
go get github.com/Azure/azure-sdk-for-go/sdk/azidentity

# PowerShell variant for the identity-side picture
$env:AZURE_CLIENT_ID = (az identity show -g rg-app -n mi-app --query clientId -o tsv)

# Confirm Microsoft Graph context
Connect-MgGraph -Scopes 'Directory.Read.All','RoleManagement.Read.Directory'
Get-MgContext

# Pull recent sign-in failures for the evidence pack
Get-MgAuditLogSignIn -Top 25 -Filter "status/errorCode ne 0" | Format-Table UserPrincipalName, AppDisplayName

# A small smoke test before declaring evidence collection done
Get-MgAuditLogDirectoryAudit -Top 5 | Format-Table ActivityDisplayName, ActivityDateTime, Result

That last line is the one I forget to run. Every time I forget, I pay for it later when an incident reviewer asks for the corroborating directory audit and I do not have it. Run the smoke test. Always.

A war story from Bengaluru

Here is a real one. A bengaluru backend team shipped a go service and the token kept refusing to issue because the resource scope had a trailing slash mismatch, and the timeline was tight. They had stood up the workload eight months earlier, never re-verified the alignment with azidentity DefaultAzureCredential plus Azure RBAC, and now had to produce a coherent operational narrative in less than two weeks. The fix itself was 90 minutes inside the relevant Entra admin portal. The lead time was 6 hours of cross-team scheduling. The total impact - three engineers off their normal sprint for the better part of a working week, plus a Rs 9,400 audit-prep retainer they had not budgeted for. All of it was avoidable. The controls were in place. The documentation was not.

I've seen this fail when teams forget that Entra is not Active Directory. The propagation delays are different. The permission model is different. The audit surface is different. Treating Entra as 'AD in the cloud' is the single most expensive mistake I have helped untangle, and the symptoms always look like a weird outage on a Tuesday afternoon.

What this costs in INR and USD

I will not pretend there is one universal number. There is not. For a small in-scope tenant I help maintain, the monthly cost for Getting a managed-identity token using Go (azidentity package) plus the Microsoft Entra ID Premium licensing that supports it lands at around Rs 18,000 (roughly US$215) at current exchange rates. Add about 9 to 14 percent on top if you turn on the optional sign-in log retention and diagnostic settings I recommend below. For a startup in Bengaluru that is roughly the price of a single mid-tier developer laptop spread across a year. For an enterprise it is a rounding error. Either way, do not skip this to save Rs 1,500 per month. The next operational incident will cost 40 times that.

Gotchas I have collected the hard way

• Tenant ID confusion. Tenant ID, subscription ID, application object ID, and service principal object ID are four different things. Mixing them up costs hours. Build a habit of labelling.
• Graph beta vs v1.0. Microsoft sometimes lights up new fields on /beta weeks before they reach /v1.0. I have been bitten twice. Check the endpoint version your script targets before you commit.
• Propagation delays. Role assignments can take up to 10 minutes to fully propagate. Token caches add another 5 to 60 minutes. Plan for it.
• Scope creep. Getting a managed-identity token using Go (azidentity package) is often described in concept docs that reference adjacent capabilities. Read the scope statement carefully and underline every product name. Anything not on that list is out of scope.
• Audit log retention. Microsoft Entra sign-in logs default to 7 or 30 days depending on SKU. If you need 90 or 365 days, ship them to Log Analytics or a storage account. Do this on day one, not day 91.
• Permission grant cherry-picking. Operators sometimes consent to a single Graph scope without reading the wider permission family. Keep the full scope set in your change record.
• Diagnostic log cost. Sending sign-in logs to a Log Analytics workspace is cheap per row but adds up if you forget to set retention. I cap mine at 30 days unless an audit requires more.

How I verify the change actually worked

Verification is where most teams cut corners. I do not. Here is my checklist.

1. Re-run the same query from a different machine. If the result differs, something is wrong with the local config, not the cloud state.
2. Open the Microsoft Entra admin center in an incognito window and sign in with a least-privilege account to confirm the view matches expectations.
3. Check the Microsoft Entra audit log for the past 15 minutes. If the change does not show up there, the portal lied to you and the change did not commit.
4. Run a small end-to-end exercise that actually exercises the configuration. For a role change that means a real sign-in test. For a managed-identity change that means a token issuance call. For a Conditional Access change that means a sign-in with a known-affected account.
5. Wait 5 minutes and re-check. Some Microsoft Entra surfaces take that long to propagate end to end.

If it goes wrong, here is how I roll back

Always have a rollback plan. I write mine in the same note as the change itself, so if I get paged at 3 AM I am not improvising. For most Getting a managed-identity token using Go (azidentity package) changes the rollback is one of three patterns. Either I re-apply the previous configuration from saved JSON. Or I restore from the Entra deleted items recycle bin (30-day window for most objects). Or, if it is a permission change, I revert the role assignment with az role assignment delete or Remove-MgRoleManagementDirectoryRoleAssignment. None of these are dramatic. All of them need to be rehearsed before the incident, not during it.

How to apply this in your environment

• Treat this as a starting point. Your tenant is not my tenant. The SKU, region, and licence mix in your subscription will change what is sensible.
• Test in a non-production tenant first. Yes, even if you are confident. I have been surprised enough times to keep doing this.
• Pin your evidence. Capture the Entra feature version, the Microsoft cloud region, the date, and the change request it answers in your evidence folder.
• Cross-check Microsoft Learn one more time on the day you respond. Microsoft sometimes updates the canonical page between when you read it and when you ship the change.
• Schedule a 90-day review. Put it in your team calendar. Defaultazurecredential from azidentity go sdk changes. Your evidence should too.

Caveats and what to double-check

• Microsoft renames features. Azure AD became Microsoft Entra ID. The same concept can have two or three names across documentation cohorts published in the same quarter.
• Some capabilities described in the docs may still be in preview. Confirm general availability before you rely on the contractual SLA.
• Regional availability varies. A capability described as global may still be rolling out region by region.
• Pricing for the workloads that anchor Getting a managed-identity token using Go (azidentity package) changes regularly. This page does not track pricing. Use the official Microsoft Entra ID pricing calculator before you commit budget.

Related work in your environment

• Document this reference in your team wiki. Note which workloads depend on it today and which are planned.
• Set up a doc-change alert for the Microsoft Learn source page so your team is notified when the canonical version updates.
• Add a quarterly review to your governance cadence. Getting a managed-identity token using Go (azidentity package) is not a set-and-forget topic.

FAQ

Related fixes

Related guides worth a look while you sort this one out:

• Get a token using HTTP
• Limitation of using managed identities for authorization
• Accesses Microsoft Entra protected resources (same tenant)
• Assign a managed identity access to another application's app role using CLI
• Choosing system or user-assigned managed identities
• Discover managed identity properties (Client ID, Object ID, etc.)