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Entra Identity

Access Reviews sign in error AADSTS90072 user external must sign in B2B: Fix

By Sai Kiran Pandrala · reviewed by Sai Kiran Pandrala, Editor Last verified: 2026-05-30

⚡ At a glance
BrandAccess Reviews
FamilyEntra Identity
CategoryMicrosoft
Guide typeProblem Fix
Skill levelIntermediate

What's happening on your Access Reviews

You hit sign in error AADSTS90072 user external must sign in B2B on a Access Reviews device in the Entra Identity family. This sits in the most-reported issue list for Access Reviews in 2026 across community forums and vendor support, meaning the recovery path is mostly known.

Fast triage (5 minutes)

  1. service restart: stop the resource cleanly for 60 seconds, then power on. About 30% of Access Reviews "sign in error AADSTS90072 user external must sign in B2B" reports clear here.
  2. Check status: any indicator service health indicators, dashboard alerts, or display codes on the Access Reviews unit right now? Note them: they decide which branch to take below.
  3. Check release notes: is this device on the latest service version / OS update from Access Reviews? An advisory for "sign in error AADSTS90072 user external must sign in B2B" may already be published.
  4. Try a clean test: a known-good cable / network / account isolates the device from external causes.
  5. Capture the exact symptom string, vendor TAC will ask for it verbatim.

Step-by-step fix for Access Reviews sign in error AADSTS90072 user external must sign in B2B

  1. Confirm scope. Is this only on the one device, or fleet-wide? If fleet-wide, treat as a release / config / network issue, not a hardware fault.
  2. Apply the safe fix first.

- On Access Reviews for "sign in error AADSTS90072 user external must sign in B2B", that usually means: soft reset → service version update from the Access Reviews official portal → re-pair the device with its management tool / app.

  1. Targeted diagnostics. Use the Access Reviews-specific diagnostic mode (most Access Reviews Entra Identity devices have one). It surfaces the exact subsystem reporting the fault, which speeds up parts ordering or escalation.
  2. Controlled hard reset (only if soft fix fails). Back up settings + data first. Then tenant reset following the Access Reviews user manual for your model. Re-enrol from scratch.
  3. Validate. Reproduce the original trigger to confirm the fix held.
  4. Document. Log what worked. If it returns, you've got a faster path next time.

Escalation path for Access Reviews

Avoid recurrence

Frequently asked questions

How long should the recovery / setup take?

For most Access Reviews Entra Identity cases, allow 15-45 minutes the first time. Repeats are usually under 10 minutes once you know the menu path.

Will this exact procedure work on every Access Reviews model?

The procedure reflects current Access Reviews behaviour. Menu paths shift between service version generations; verify against the manual for your specific model + revision.

Is the procedure safe in production / live use?

Apply during a maintenance window where possible. Capture pre-change state. Access Reviews doesn't usually publish rollback procedures, so make sure you can restore manually.

Does this affect my Access Reviews support coverage?

Standard operation per the user manual + applying official service version updates does NOT void support coverage. Opening managed services, third-party repair, or unauthorised modifications can void support coverage, check before going further.

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

References

Reference material, not professional advice. Validate with your vendor manual and follow local regulations.

What changed recently?

Fault diagnosis on a Access device goes faster when you map the symptom to a recent change:

The answer narrows the root cause to a manageable subset.

Before you start

A few things to confirm so the Access device fix goes cleanly:

Verification checklist

After applying the fix on your Access device, confirm:

Escalation guide

For a Access device, the right escalation depends on impact:

More frequently asked questions

How long does this fix usually take?

Most users complete the steps in 20-45 minutes the first time, and 5-10 minutes on subsequent runs once the menu paths are familiar.

Are there safer alternatives for non-technical users?

Yes. the manufacturer's self-service troubleshooter (HP Smart, LG ThinQ, Samsung Members, similar) usually walks through the same steps in a guided UI. Use that first if you're not comfortable with menu paths.

Should I update service version first or last?

Update service version first if a release note specifically mentions your symptom. Otherwise, finish the troubleshooting flow first, then update; that way you can isolate whether the update or the underlying fix solved it.

Will the procedure work on the international variant?

Some features and service version paths are region-locked. Check the model spec sheet to confirm your variant supports the menu option referenced. If you're outside the US/EU, look for the regional support portal.

What if my model isn't exactly the same revision?

Cross-check the model code on the rating plate against the manufacturer support page. Major service version generations sometimes shift the menu path; the option is usually under a similarly-named section.

Field notes from real Entra Identity incidents

When I work on Access Reviews sign in error AADSTS90072 user external must sign in B2B: Fix the rhythm I lean on is the one I have built over years of these tickets. Sign-in logs are the single highest-signal Entra surface, every failure has a specific status code and the doc page for that code is one search away. Conditional Access What-If is the only safe way to test a policy change; deploying first and watching the support queue light up is the dangerous way. The Microsoft Graph PowerShell SDK is the path forward for Entra automation; the legacy AzureAD module is on a timer.

Tools I actually reach for

For Access Reviews sign in error AADSTS90072 user external must sign in B2B: Fix on Access Reviews the cheapest signal I can land usually comes from Entra admin center, then AzureAD module (legacy, deprecation pending), Conditional Access What-If tool, Microsoft Graph PowerShell SDK when Entra admin center cannot see the layer the fault sits in, and Audit logs for the cases where neither of those answers cleanly. That ordering is not academic. It matches the layers the failure tends to surface through, so the cheap signal lands first and the heavier tooling only comes out when the simpler answer does not hold up under scrutiny.

Verification I run before I close the ticket

Before I mark Access Reviews sign in error AADSTS90072 user external must sign in B2B: Fix resolved on a Access Reviews unit, the verification loop below is what I actually run. Each step proves a different layer is green, and the order matters - the cheap checks gate the more expensive ones.

Get-MgConditionalAccessPolicy | Select-Object DisplayName,State

If that one comes back clean, move to the next check. If it does not, stop and dig in there before layering more verification on top of a red signal.

Get-MgAuditLogSignIn -Top 25 -Filter "createdDateTime gt 2026-05-01T00:00:00Z"

If that one comes back clean, move to the next check. If it does not, stop and dig in there before layering more verification on top of a red signal.

Connect-MgGraph -Scopes 'AuditLog.Read.All','Directory.Read.All'

If that one comes back clean, move to the next check. If it does not, stop and dig in there before layering more verification on top of a red signal.

Entra > Diagnose and solve problems > run the relevant playbook

Only when every line above runs clean do I close the ticket and update the runbook with the timestamps.

Where I check first when the docs disagree

When two sources contradict each other on a Entra Identity detail, the disambiguation order I lean on is stable. I usually start at techcommunity.microsoft.com/category/azure-active-directory for the ground-truth view on Entra Identity. I usually start at azure.microsoft.com/updates for the ground-truth view on Entra Identity. I usually start at learn.microsoft.com/entra for the ground-truth view on Entra Identity. Random blog posts and reseller wikis are signal, not ground truth, and I treat them as such until the references above either confirm or contradict the claim.

Pitfalls I have walked into on this exact path

The shortcuts that look smart on Access Reviews sign in error AADSTS90072 user external must sign in B2B: Fix have a habit of biting back. The pitfalls below are the ones I have personally walked into on a Access Reviews unit, not things I read about. The Microsoft Graph PowerShell SDK is the path forward for Entra automation; the legacy AzureAD module is on a timer. Sign-in logs are the single highest-signal Entra surface: every failure has a specific status code and the doc page for that code is one search away. Conditional Access What-If is the only safe way to test a policy change; deploying first and watching the support queue light up is the dangerous way. When in doubt I revert to the slower path that the manual prescribes - the time I save by skipping it is always smaller than the time I spend cleaning up afterwards.

What I tell the next on-call

When I hand Access Reviews sign in error AADSTS90072 user external must sign in B2B: Fix off to the next person on rotation, the three lines I leave in the runbook are these. First, the symptom signature for Access Reviews on the Entra Identity family - not a paraphrase, the exact string that surfaces. Second, the diagnostic that gave the highest signal in the least time. Third, the exact verification command whose green output justified closing the ticket. That trio is what turns a one-off fix into a runbook entry the next engineer can use without paging me at three in the morning.

I also add a one-line note on the cost of getting this wrong. For Access Reviews sign in error AADSTS90072 user external must sign in B2B: Fix on a Access Reviews unit, the cost is rarely the replacement part. It is the downtime, the second site visit, and the trust deficit you spend with whoever owns the asset when the fix does not hold. That framing keeps the next on-call from choosing the cheap-looking shortcut that ends up costing the most in elapsed hours and goodwill.